Make LyX compiled by MSVC 2015 run on Vista again

Patch and tests from Dima Ruinskiy, comments by me. For details see discussion
in bug 10186.

CMakeLists.txt

@@ -766,10 +766,14 @@ if(WIN32)
 		set(WIN32_CONSOLE WIN32)
 	endif()
 	if(MSVC)
-		add_definitions(-D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -DNOMINMAX)
+		# -DPSAPI_VERSION=1 is needed to run on vista (bug 10186)
+		add_definitions(-D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -DNOMINMAX -DPSAPI_VERSION=1)
 		# disable checked iterators for msvc release builds to get maximum speed
 		set(CMAKE_CXX_FLAGS_RELEASE  "${CMAKE_CXX_FLAGS_RELEASE} /D_SECURE_SCL=0")
 	else()
+		# -DPSAPI_VERSION=1 is not needed for mingw, since the mingw psapi.h
+		# does not use it and always declares the vista compatible API.
+		# If this ever changes then -DPSAPI_VERSION might be needed here as well. 
 		add_definitions(-DWINVER=0x0500)
 	endif()
 endif()

lib/CREDITS

@@ -468,6 +468,9 @@
 @bPaul A. Rubin
 @iE-mail: rubin () msu ! edu
    Major rework of the AMS classes
+@bDima Ruinskiy
+@iE-mail: dima.ruinskiy () outlook ! com
+   Reintroduction of Windows Vista support (bug 10186)
 @bGuy Rutenberg
 @iE-mail: guyrutenberg () gmail ! com
    System call fixes

lib/generate_contributions.py

@@ -1571,6 +1571,14 @@ contributors = [
                  "25 September 2007",
                  u"Major rework of the AMS classes"),
 
+     contributor(u"Dima Ruinskiy",
+                 "dima.ruinskiy () outlook ! com",
+                 "GPL",
+                 "Joining LyX development team",
+                 "m=146687842921797",
+                 "24 June 2016",
+                 u"Reintroduction of Windows Vista support (bug 10186)"),
+
      contributor(u"Guy Rutenberg",
                  "guyrutenberg () gmail ! com",
                  "GPL",

status.22x

@@ -198,3 +198,6 @@ What's new
 - Fix monolithic builds with autotools on Mac OS X.
 
 - Avoid 'ar' warning with recent binutils versions.
+
+- LyX compiled with Microsoft Visual Studio 2015 runs now on Windows Vista (bug 10186)
+