BUG: Fix logic to return true when the file was already statted. Also, use nanosecond percision if available. Remove debug

ENH: Improve performance of check build system by creating another file that is simpler to parse and therefore much faster overall

ENH: Add support for setting the maximum number of errors and warnings reported. This should fix Bug #2318 - The maximum number of errors to report is fixed to 50

ENH: avoid the use of GET_TARGET_PROPERTY by testing the CMake executable instead of the test executable

BUG: Reverting fundamental type info change until it is fixed on more platforms.  It was tested on Linux, SGI, HP, Sun, OSX, Windows with nmake and VS 6, 7, 7.1, 8, Borland Make, and cygwin by hand with spaces in the path and cmake 2.0 and 2.2 before committing but still seems to be failing on some dashboards...strange.

ENH: Converting FundamentalType try-compiles into a single try-run.  All the information about the existence, size, and signedness of types can be determined in one program thanks to limits.h.