LibCMT Code

Dispose() method removed.

Minor spell fixes.

Added initial XML documentation tags.

Initial import.

Removed IDisposable from the ancestors of ILibCMTCommittable.

Added argument sanity checks. Moved a little to Mono coding style. Made some
method's access more restricted.

Removed GCHandle usage. Use instead object identifiers which are passed into
the native side. This will fix the non-blittable issue with Mono 1.1.

LIBCMT_HAVE_GACUTIL changed to LIBCMT_USE_GACUTIL.

Added option --disable-gacutil, for people who only want to build the
assembly, without installing it.

Test of basic transactional variable's usage, with threading.