Add docs to mingw release and don't modify libtool files in mingw's M…

…akefile

(cherry picked from commit 2b2907d)

Updated to version 2.30.7 for release

Updated to version 2.30.6 for release

Updated to version 2.30.5 for release

Updated to version 2.30.4 for release

Updated to version 2.30.3 for release

Updated to version 2.30.2 for release

Updated to version 2.30.1 for release

Updated to version 2.30.0 for release

Updated to version 2.29.3 for RC build