ERR: Avoiding namespace pollution: kw_sys -> kwsys_ns.  Also undefining the macro at the correct time.

ERR: Avoiding namespace pollution: kw_sys -> kwsys_ns.  Also undefining the macro at the correct time.

ERR: On Borland preprocessor goes into recursion which adds some weid spaces in the include name. This fixes it

ENH: Added automatic adjustment of C++ flags to include -timplicit_local and -no_implicit_include for the Compaq compiler on OSF.

BUG: Most of time when asking if file exists, we actually want to read it... Should fix Bug #809 - FIND_INCLUDE should check readability

BUG: fix for 301 CMAKE_LIBRARY_PATH and CMAKE_INCLUDE_PATH env vars now used in FIND_LIBRARY and FIND_PATH in addtion to and before PATH

BUG: Like cygwin, mingw does not produce .lib file for shared libraries, so search for dll when searching for library

ENH: On Cygwin shared libraries have only .dll file no .lib file, so when finding library on cygwin, search also for .dll. Also fix SimpleInstall test on cygwin

BUG: CopyFileIfDifferent should return success if the files did not differ or if the copy succeeded.  It should return failure only if the files were different and the copy failed.