Since we do not need the information about the target architecture
we can use the PlatformName only to specify the this information.
This also removes setting of the MSVC_*_ARCHITECTURE_ID variable
which is not required, because this variable gets set by the
compiler detection code in CMAKE_DETERMINE_COMPILER_ID_CHECK().
Solution folders are supported as read-only in the VS11 Express
Edition, so do not prohibit their use just because we detect the
express edition (as we did in the VS10 generator).
Inspired-by: Paris
Since the parent commit the local generator Version ivar may be
compared for ordering. Convert comparisons:
"==VS10" becomes ">=VS10"
"!=VS10" becomes "< VS10"
to support an explicit enumeration value for VS11 with no change
in behavior.
Patrick Gansterer
David Cole
Brad King