ENH: Added FundamentalType header defining platform-independent fixed size/signedness integer types.

ENH: Added TEST_KWSYS_CXX_SAME_LONG_AND___INT64, TEST_KWSYS_CXX_SAME_LONG_LONG_AND___INT64, TEST_KWSYS_CAN_CONVERT_UI64_TO_DOUBLE, and TEST_KWSYS_CHAR_IS_SIGNED.

ENH: Moved kwsys_ns and kwsysEXPORT macros to Configure.h in the case of building a kwsys source file.  This allows more than one header to be included in a kwsys source file without redefining the macros.

BUG: Revert the change to FileIsDirectory. Add FileIsSymlink and treat symlinks as files when removing directory

BUG: When removing directory, use lstat instead of stat to make sure that symlinks are treated as files and not as directories

ENH: Extended test 0 to run the executable twice using the same process object.  This tests the reusability of the objects.

BUG: Do not increment optr by 2 after storing only one character.  Also fixed possibility of storing uninitialized characters from the last triplet.

ENH: Added some smaller primes to allow small hash table sizes and therefore shorter initial construction times.

BUG: Use sleep(1) instead of usleep(1000000) because some UNIX systems specify that the argument to usleep must be less than 1000000.

ENH: fix test, it has to return a true/false value otherwise it just passes the test, and add test for EscapeChars

ENH: add convenience function to convert Windows command line args into Unix argc/argv. Pulled and cleaned from PV/VV/VJ init code

BUG: struct timeval uses unsigned types on at least one platform (QNX).  Alot of the time logic assumes a signed type.  Switch to using a signed representation that is converted to the native representation only for system calls.