Define NDEBUG during the optimize build.  assert are now elided.

Note: R__ASSERT are never elided and can be use for check that should
be done in both debug and optimized builds.
typo
Suppress more warnings (when compiling with NDEBUG)
Suppress more warnings (when compiling with NDEBUG)
Suppress more warnings (when compiling with NDEBUG)
Make version 6.00.01.
Update version to 6.01.01 - dev after 6.00.01.