Started release-0.36.0
Added the definition of GL_POLYGON_MODE if missing
Fixed a problem in the build system

- Added the EGLPLUS_LINK_LIB=1 definition to oglplus examples.
Backporting to MSVC

- Removed a superfluous typedef.
Fixed typos in Texture and DSATextureEXT
Update of the changelog
Removed a unused variable warning
Minor fixup of the build system
GL compatibility fix
Multiple changes

- Fixed some problems in Doxyfiles.
- Minor documentation fix.
- Update of the web index page and the news feed source.
Merge branch 'release-0.36.0' into develop