Bring BME_bevel code back (stage 1), porting it from the old BKE_bmesh to the new BMesh methods and data structures, and turns on compilation of this again. This makes the code work but isn't using it to do the bevel modifier just yet - that's coming next.

Fix [#29984] Loop select crash on some wire edge meshes

Crash was because the loop walker's wire edge handling wasn't general enough (handled only wire edges that were connected to exactly one other wire edge)

Fix build break with double-definition of EXR stubs

A better solution would be to mark all function in openexr_multi.h as forceinline or static, but this change just fixes it to work for the reason trunk works: the header defining the stubs is only needs to be included in one .c file

Fix broken normals with mirror modifier

Fix blenderplayer build (by adding missing bad level call stubs)

Fix loading .blend files (disable pre-bmesh forward-compat code for loading MPolys and converting to MFaces)

Adjust face menu links to "mirror uvs" and "mirror colors" to use the bmesh n-gon-compatible replacements "reverse uvs" and "reverse colors"

Reverse default direction of "rotate colors" to match the (only rotation direction) of rotate colors in trunk

Remove face menu (ctrl+f) links to f-gon commands

Fix for RNA_warning crashing on MSVC release builds

MSVC is not C99-compliant, but with the macro as it was, the "args" part was consuming and dropping one of the params, so the format string wanted N extra args, and there were only N-1... boom, crash! Without "args" this works correctly (checked on MSVC10 release build)