Move to GYP-based project file generation (issue #48).

- Add cef_create_projects.bat to generate the CEF project files.
- Change include paths to be relative to the root CEF directory.
- Add patch_build configuration and build.patch to modify the Chromium build system for required CEF dependencies.
- Remove old .vcproj and .vsprops files.
- Eliminate use of precompiled headers.
- Commit generated project files (these will go away in the near future).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@50 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

patch/patches/build.patch

@@ -0,0 +1,32 @@
+Index: common.gypi
+===================================================================
+--- common.gypi	(revision 26790)
++++ common.gypi	(working copy)
+@@ -15,6 +15,9 @@
+ 
+     # Variables expected to be overriden on the GYP command line (-D) or by
+     # ~/.gyp/include.gypi.
++    
++    # Directory for CEF source files. This will be set by cef.gypi.
++    'cef_directory%' : '',
+ 
+     # Putting a variables dict inside another variables dict looks kind of
+     # weird.  This is done so that "branding" and "buildtype" are defined as
+Index: win/system.gyp
+===================================================================
+--- win/system.gyp	(revision 26790)
++++ win/system.gyp	(working copy)
+@@ -22,6 +22,13 @@
+           'action': ['', '<@(_inputs)'],
+         },
+       ],
++      'conditions': [
++        ['cef_directory!=""', {
++          'dependencies': [
++            '../../<(cef_directory)/cef.gyp:patcher',
++          ],
++        }],
++      ],
+     },
+   ],
+ }