Disabled 'Fast Runtime Checks' on Visual Studio as they slow down debug builds unnecessary.

See this explanation:  http://randomascii.wordpress.com/2011/07/22/visual-c-debug-buildsfast-checks-cause-5x-slowdowns/

scripts/cmake/CompilerSetup.cmake

 INCLUDE(ResetConfigurations)        # To Debug, Release, RelWithDbgInfo
 INCLUDE(SetDefaultBuildType)
+INCLUDE(DisableCompilerFlag)
 SET_DEFAULT_BUILD_TYPE(Debug)
 INCLUDE(MSVCMultipleProcessCompile) # /MP switch (multi processor) for VS
 
@@ -67,6 +68,8 @@ IF (WIN32)
 		)
 		# Sets warning level 3 and ignores some warnings
 		SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W3 /wd4290 /wd4267")
+
+		DisableCompilerFlag(DEBUG /RTC1)
 	# cygwin
 	ELSE (MSVC)
 		MESSAGE (STATUS "Might be GCC under cygwin.")