STYLE: Fixed documentation of how to produce forwarding executables for multi-configuration builds with CMAKE_INTDIR.

BUG: When a "wrong argument" was detected, we call the WrongArgument handler. If the handler returns success, the argument parsing should continue. Currently, it was stopping parsing immediately after the wrong argument was processed, irrespective of the WrongArgument handler status. Fixed that.

BUG: FileIsDirectory would remove the trailing '/' even when the path is indeed the root i.e. '/'. Hence the test would be incorrect for root directory. Fixed that.

ENH: Adding stringstream compatibility implementation.  It is currently identical to ostringstream.  Fixed local variable pcount hiding method warning.

BUG: revert yesterday patch. The implementation was correct. The problem was that _WIN32 was forced to be #define on cygwin when included from ITK, which was miss matching the implementation from the declaration. Put extra condition for CYGWIN system

BUG: Make sure to use the Win32 interface (HINSTANCE) for handling shared lib on cygwin and mingw system

ENH: Changes based on patch from Ryan C. Gordon to enable process execution on BeOS.  There seems to be no way to implement it without polling (or threads).

BUG: Fix problem with loading dylib on Tiger (10.4) x86. We need to be using the dlopen/dlclose instead of the old NSModule

BUG: Correct the SystemReportDebugHook function. It should not call exit. It gets called multiple times at shutdown in a memory leak reporting scenario... This is the source of the long standing KWWidgetsTour debug build dashboard failure.

COMP: Fix or suppress warnings on Borland and Mac dashboards. Definitely fix "may be used uninitialized" warnings.

STYLE: Make the set of supported STL headers the same in vtkstd and vtksys/stl. (The union of the present values of the two sets.)

ENH: Adding Shell_Flag_EchoWindows option to setup escapes for arguments to the native echo command in a shell.  This special case is needed to avoid adding quotes when passing text to echo in a native windows shell which does no command line parsing at all.

ENH: Adding tests KWSYS_C_HAS_PTRDIFF_T and KWSYS_C_HAS_SSIZE_T to help ProcessUNIX.c build everywhere without warnings.

ENH: Renamed kwsysPlatformCxxTests to kwsysPlatformTests and generalized it for multiple language tests (C and CXX).

ENH: Added Process_SetPipeNative method to allow user code to override the pipes connected to the child pipeline.

ENH: Re-implemented command line argument shell quoting to support several platforms with one code base.

BUG: Windows_ShellArgument: need to escape if the string contains one of a set of special characters as well as spaces.  Moved test for needing escapes to a separate method kwsysSystemWindowsShellArgumentNeedsEscape.

ENH: Adding 'System' component of C sources to hold system tools written in C.  Moved windows shell command line argument escaping code to kwsysSystem_Windows_ShellArgument and kwsysSystem_Windows_ShellArgumentSize.

ENH: Added KWSYS_SHARED_FORWARD_OPTION_COMMAND option to allow users to replace the command executed.  Extended documentation at top of file.