remove unused enum

Change-Id: Ib5cc05f20fad673c015700657f02a07659e0c566
add native OpenGL debug output for dbgutil builds

depends on support of ARB_debug_output

Change-Id: I8c96284377e2cb9d2ee06ddd4101c1de4d0fbe9f
add documentation where to find spec and ile format docs for qpro

Change-Id: I94aa2a5522bdcf3f6c5cdd6fef200c678132b3d6
fix QPro import filter, related #i41688#

We desperately need a test document for this format.

Change-Id: Ifd8e35bb3330c2b9d2443a3a0f18209001a4bdff