Bug 588: Adding jogamp.version property, i.e. 2.0.2-rc-<TIMESTAMP> used for Manifest ; Common jogamp_int_version for Android.

Until 2.0.2 gets released, the version string is 2.0.2-rc-<TIMESTAMP>
and used in the Manifest for IMPLEMENTATION_VERSION.

The previous build version name of IMPLEMENTATION_VERSION
goes into the new tag IMPLEMENTATION_BUILD.

Further more, we use a common jogamp_int_version for Android, to make life more easy.