Issue #25: Remove pro/qbs, fix MSVC build

Pdf4QtViewerPlugins/OutputPreviewPlugin/OutputPreviewPlugin.pro

@@ -1,55 +0,0 @@
-#    Copyright (C) 2021 Jakub Melka
-#
-#    This file is part of PDF4QT.
-#
-#    PDF4QT is free software: you can redistribute it and/or modify
-#    it under the terms of the GNU Lesser General Public License as published by
-#    the Free Software Foundation, either version 3 of the License, or
-#    with the written consent of the copyright owner, any later version.
-#
-#    PDF4QT is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU Lesser General Public License for more details.
-#
-#    You should have received a copy of the GNU Lesser General Public License
-#    along with PDF4QT.  If not, see <https://www.gnu.org/licenses/>.
-
-TEMPLATE = lib
-DEFINES += OUTPUTPREVIEWPLUGIN_LIBRARY
-
-QT += gui widgets
-
-include(../../Pdf4Qt.pri)
-
-LIBS += -L$$OUT_PWD/../..
-
-LIBS += -lPdf4QtLib
-
-INCLUDEPATH += $$PWD/../../Pdf4QtLib/Sources
-
-DESTDIR = $$OUT_PWD/../../pdfplugins
-
-SOURCES += \
-    inkcoveragedialog.cpp \
-    outputpreviewdialog.cpp \
-    outputpreviewplugin.cpp \
-    outputpreviewwidget.cpp
-
-HEADERS += \
-    inkcoveragedialog.h \
-    outputpreviewdialog.h \
-    outputpreviewplugin.h \
-    outputpreviewwidget.h
-
-CONFIG += force_debug_info
-
-DISTFILES += \
-    OutputPreviewPlugin.json
-
-RESOURCES += \
-    icons.qrc
-
-FORMS += \
-    inkcoveragedialog.ui \
-    outputpreviewdialog.ui

Pdf4QtViewerPlugins/OutputPreviewPlugin/OutputPreviewPlugin.qbs

@@ -1,16 +0,0 @@
-import qbs
-
-Pdf4QtPlugin {
-    name: "OutputPreviewPlugin"
-    files: [
-        "*.h",
-        "*.cpp",
-        "*.ui",
-        "icons.qrc",
-    ]
-    cpp.includePaths: ["."]
-    Properties {
-        condition: qbs.hostOS.contains("windows")
-        cpp.defines: "OUTPUTPREVIEWPLUGIN_LIBRARY"
-    }
-}