Original commit message from CVS:
* ext/hermes/gsthermescolorspace.c: (plugin_init): decrease rank
by 2 to not interfere with other colorspaces.
* ext/pango/gsttextoverlay.c: (plugin_init): change rank to NONE
* gst/colorspace/gstcolorspace.c: (plugin_init): decrease rank by
one to not interfere with ffmpeg_colorspace.