ENH: Improve internal test handling by creating a test class. Command cmEnableTesting now only sets CMAKE_TESTING_ENABLED and cmAddTest only adds a test to the list. The actual test files are written by local generator. This way we can at some point in the future replace DartTestfile with some XML file

BUG: Older SGI compilers still have internal/stdio_core.h but do not support #include_next.  We'll have to try-compile to test whether this hack is needed.

ENH: Created cmTarget::GetLibraryNames to replace cmLocalUnixMakefileGenerator2::GetLibraryNames.  Added cmTarget::GetLibraryCleanNames to be used by cmLocalUnixMakefileGenerator2.  Now when a library is linked both the shared and static versions are removed from the build tree.  In this way we avoid having both kinds of libraries present when the user switches BUILD_SHARED_LIBS on/off.  This prevents problems with turning off shared libraries and then expecting the linker to use the static libraries only to find it is using the out-of-date shared versions.

ENH: Added cmTarget::GetBaseName and cmTarget::GetFullName methods and removed cmLocalGenerator::GetFullTargetName and cmLocalUnixMakefileGenerator2::GetBaseTargetName.  This functionality is more sensibly implemented in cmTarget.  It is also needed for an upcoming feature in which both the shared and static versions of a library will be removed before one is linked.

BUG: Drastically extending test5's timeouts to get it to pass when running on a heavily-loaded machine.

COMP: Added KWSys try-compiles KWSYS_STL_HAS_ALLOCATOR_TEMPLATE and KWSYS_STL_HAS_ALLOCATOR_OBJECTS.  Needed for more old-stl support in the hashtable.

BUG: When killing a child all the pipe read ends should be closed.  This will allow a child that is blocking while waiting to write to the pipe to wake up and receive the kill signal properly on cygwin.

BUG: Expanded difference in timeouts between tests 4 and 5 so that 5 does not timeout while waiting for 4 to timeout.  This should fix the intermittent failure of test 5 on cygwin.  ENH: When a mismatch is reported it now reports what it was as well as what it should have been.

BUG: For some reason the non-template allocator test compiles on VS6 even though its allocator is a template.  Adding ::size_type to be sure it accesses a member of the allocator.

BUG: Cannot use Win32 implementation for cygwin processes because then cygwin paths to executables like /usr/bin/ls are not found.

COMP: Added KWSYS_CXX_HAS_CSTDDEF try-compile to KWSys to provide kwsys/cstddef header (to get size_t for hash_fun.hxx).