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GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007

Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>

Everyone is permitted to copy and distribute verbatim copies of this license
document, but changing it is not allowed.

This version of the GNU Lesser General Public License incorporates the terms
and conditions of version 3 of the GNU General Public License,
supplemented by the additional permissions listed below.

0. Additional Definitions.

As used herein, "this License" refers to version 3 of the
GNU Lesser General Public License, and the "GNU GPL" refers to
version 3 of the GNU General Public License.

"The Library" refers to a covered work governed by this License,
other than an Application or a Combined Work as defined below.

An "Application" is any work that makes use of an interface provided by the
Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a mode of using
an interface provided by the Library.

A "Combined Work" is a work produced by combining or linking an Application
with the Library.  The particular version of the Library with which
the Combined Work was made is also called the "Linked Version".

The "Minimal Corresponding Source" for a Combined Work means the
Corresponding Source for the Combined Work, excluding any source code for
portions of the Combined Work that, considered in isolation, are based on the
Application, and not on the Linked Version.

The "Corresponding Application Code" for a Combined Work means the object code
and/or source code for the Application, including any data and utility programs
needed for reproducing the Combined Work from the Application, but excluding
the System Libraries of the Combined Work.

1. Exception to Section 3 of the GNU GPL.
You may convey a covered work under sections 3 and 4 of this License without
being bound by section 3 of the GNU GPL.

2. Conveying Modified Versions.
If you modify a copy of the Library, and, in your modifications, a facility
refers to a function or data to be supplied by an Application that uses the
facility (other than as an argument passed when the facility is invoked),
then you may convey a copy of the modified version:

     a) under this License, provided that you make a good faith effort to ensure
     that, in the event an Application does not supply the function or data,
     the facility still operates, and performs whatever part of its purpose
     remains meaningful, or

     b) under the GNU GPL, with none of the additional permissions of this
     License applicable to that copy.

3. Object Code Incorporating Material from Library Header Files.
The object code form of an Application may incorporate material from a header
file that is part of the Library.  You may convey such object code under terms
of your choice, provided that, if the incorporated material is not limited to
numerical parameters, data structure layouts and accessors, or small macros,
inline functions and templates (ten or fewer lines in length),
you do both of the following:

     a) Give prominent notice with each copy of the object code that the
     Library is used in it and that the Library and its use are covered by
     this License.

     b) Accompany the object code with a copy of the GNU GPL and
     this license document.

4. Combined Works.
You may convey a Combined Work under terms of your choice that, taken together,
effectively do not restrict modification of the portions of the Library
contained in the Combined Work and reverse engineering for debugging such
modifications, if you also do each of the following:

     a) Give prominent notice with each copy of the Combined Work that the
     Library is used in it and that the Library and its use are covered by
     this License.

     b) Accompany the Combined Work with a copy of the GNU GPL and
     this license document.

     c) For a Combined Work that displays copyright notices during execution,
     include the copyright notice for the Library among these notices,
     as well as a reference directing the user to the copies of the GNU GPL and
     this license document.

     d) Do one of the following:

           0) Convey the Minimal Corresponding Source under the terms of this
           License, and the Corresponding Application Code in a form suitable
           for, and under terms that permit, the user to recombine or relink
           the Application with a modified version of the Linked Version to
           produce a modified Combined Work, in the manner specified by
           section 6 of the GNU GPL for conveying Corresponding Source.

          1) Use a suitable shared library mechanism for linking with
          the Library.  A suitable mechanism is one that (a) uses at run time a
          copy of the Library already present on the user's computer system,
          and (b) will operate properly with a modified version of the Library
          that is interface-compatible with the Linked Version.

     e) Provide Installation Information, but only if you would otherwise be
     required to provide such information under section 6 of the GNU GPL,
     and only to the extent that such information is necessary to install and
     execute a modified version of the Combined Work produced by recombining or
     relinking the Application with a modified version of the Linked Version.
     (If you use option 4d0, the Installation Information must accompany
     the Minimal Corresponding Source and Corresponding Application Code.
     If you use option 4d1, you must provide
     the Installation Information in the manner specified
     by section 6 of the GNU GPL for conveying Corresponding Source.)

5. Combined Libraries.
You may place library facilities that are a work based on the Library
side by side in a single library together with other library facilities
that are not Applications and are not covered by this License, and convey such
a combined library under terms of your choice, if you do both of the following:

     a) Accompany the combined library with a copy of the same work based on
     the Library, uncombined with any other library facilities,
     conveyed under the terms of this License.

     b) Give prominent notice with the combined library that part of it is
     a work based on the Library, and explaining where to find the accompanying
     uncombined form of the same work.

6. Revised Versions of the GNU Lesser General Public License.
The Free Software Foundation may publish revised and/or new versions of
the GNU Lesser General Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

Each version is given a distinguishing version number.
If the Library as you received it specifies that a certain numbered version
of the GNU Lesser General Public License "or any later version" applies to it,
you have the option of following the terms and conditions either of that
published version or of any later version published by
the Free Software Foundation. If the Library as you received it does not specify
a version number of the GNU Lesser General Public License,
you may choose any version of the GNU Lesser General Public License
ever published by the Free Software Foundation.

If the Library as you received it specifies that a proxy can decide whether
future versions of the GNU Lesser General Public License shall apply,
that proxy's public statement of acceptance of any version is permanent
authorization for you to choose that version for the Library.