Made versiontag optional
Merge pull request #6007 from topfs2/helix_versiontag

Helix versiontag
vdpau: advanced settings for auto deinterlacing
ActiveAE: slightly reduce buffer size
pthreads: use mutex protocol PTHREAD_PRIO_INHERIT
vaapi: lock gfx context on pre-cleanup
Bump xbmc-pvr-addons ref