INSTALL.Win32: update file

The file was hopelessly outdated. I updated it by moving the updated info to the Wiki. The Wiki allows to use some screenshots because images explain more than text.

INSTALL.Win32

@@ -1,102 +1,18 @@
 Compiling LyX 2.2 for Win32 and creating Windows installer
 ==========================================================
 
-It's recommended to compile LyX using Microsoft Visual C++ 2010 and CMake.
+It's recommended to compile LyX using Microsoft Visual C++ 2015 and CMake.
 Pre-compiled packages with dependencies are provided for this environment.
 
 
 Compiling with Microsoft Visual C++
 ===================================
 
-	These instructions assume the LyX source code is in C:\LyX\lyx-21
+Follow this Wiki page:
-	You can also use another directory if you prefer.
 
-1	Install MSVC 2010
+	http://wiki.lyx.org/Windows/Compilation
 
-	If you don't have Visual C++ 2010 installed, get the free Express edition from
+If you find there any errors please write a mail to the lyx-devel mailing list.
-	http://www.microsoft.com/express/Downloads/
-
-	(All dependencies are linked against the MSVC 2010 runtime and won't work in
-	combination with MSVC 2008. You'll get crashes and other unexpected issues.)
-
-2	Install Qt
-
-	Download the latest Qt for Open Source C++ development on Windows (VS2010)
-	from http://qt-project.org/downloads
-
-3	Install Python
-
-	Install the latest Python 2.x version (not Python 3.x !) from
-	http://www.python.org/download/
-
-4	Install CMake
-
-	Install the latest CMake from http://www.cmake.org
-
-5	Configure
-
-	- Run the CMake GUI.
-	 
-	- Set the source code path to C:\LyX\lyx-21
-	  Set the build path to C:\LyX\lyx-21-build
-	  Click Configure and set the generator to Visual Studio 10.
-
-	- Enable LYX_DEPENDENCIES_DOWNLOAD and click Configure.
-	  Pre-compiled dependencies will automatically be downloaded.
-	
-	- Set QT_QMAKE_EXECUTABLE to e.g.
-	  C:\Qt\qt-everywhere-opensource-src-4.8.4\bin\qmake.exe
-	  and Configure again.
-
-	- Enable the LYX_INSTALL option, set CMAKE_INSTALL_PREFIX to
-	  C:\LyX\lyx-21-install and click Configure.
-
-	- Check the Advanced checkbox.
-	  Set GETTEXT_MSGFMT_EXECUTABLE to
-	  C:\LyX\lyx-21-build\msvc2010-deps\deps20\gettext-tools\msgfmt.exe,
-	  and do the same for the other gettext tools.
-
-	- Click Generate.
-
-6	Compile
-
-	A Microsoft Visual C++ solution should have been generated at
-	C:\LyX\lyx-21-build\lyx.sln
-	Compile the INSTALL project to get a LyX installation in
-	C:\LyX\lyx-21-install
-
-7	Copy dependencies
-
-	Copy
-	- C:\LyX\lyx-21-build\msvc2010-deps\deps20\bin
-	- C:\LyX\lyx-21-build\msvc2010-deps\deps20\imagemagick
-	- C:\LyX\lyx-21-build\msvc2010-deps\deps20\python
-	- C:\LyX\lyx-21-build\msvc2010-deps\deps20\ghostscript
-	- C:\LyX\lyx-21-build\msvc2010-deps\deps20\Resources
-	to C:\LyX\lyx-21-install
-
-	And copy from the Qt bin directory
-	(e.g. C:\Qt\bin)
-	QtCore4.dll
-	QtGui4.dll
-	QtCore4d.dll (if compiling Debug version)
-	QtGui4d.dll (if compiling Debug version)
-	to C:\LyX\lyx-21-install\bin
-
-8	Define path prefix
-
-	Add the following line to C:\LyX\lyx-21-install\Resources\lyxrc.dist,
-	so LyX will find the bundled tools such as Python, ImageMagick
-	and Ghostscript:
-
-	\path_prefix "$LyXDir\bin;$LyXDir\python;$LyXDir\imagemagick;$LyXDir\ghostscript"
-
-	You may also add the location of your LaTeX installation if it's not on the
-	system PATH, and the location of JabRef.
-
-9	Start LyX
-
-	C:\LyX\lyx-21-install\bin\lyx.exe
 
 
 Creating the Installer