Bumping version for 1.2.0.0 release

Bumping version number for 1.1.0.0 release.

Fix doxygen warnings

Fix doxygen warnings caused by #7.

Fix issue #4.

Fix issue #4. Apparently GCC 6 handles constexpr differently than GCC7, so BoundedConstexprValue was removed and inlined.

Release Version 0.2.0.6