Fix build on VC9. Remove VC10 artifacts. Update READMEs.

tsk3/fs/hfs.c

win32/BUILDING.txt

win32/blkcalc/blkcalc.vcproj

win32/blkcalc/blkcalc.vcxproj

win32/blkcalc/blkcalc.vcxproj.filters

win32/blkcat/blkcat.vcproj

win32/blkcat/blkcat.vcxproj

win32/blkcat/blkcat.vcxproj.filters

win32/blkls/blkls.vcproj

win32/blkls/blkls.vcxproj

win32/blkls/blkls.vcxproj.filters

win32/blkstat/blkstat.vcproj

win32/blkstat/blkstat.vcxproj

win32/blkstat/blkstat.vcxproj.filters

win32/callback-cpp-sample/callback-cpp-sample.vcproj

win32/callback-cpp-sample/callback-cpp-sample.vcxproj

...2/callback-cpp-sample/callback-cpp-sample.vcxproj.filters

win32/callback-sample/callback-sample.vcproj

win32/callback-sample/callback-sample.vcxproj

win32/callback-sample/callback-sample.vcxproj.filters