no need to pass quality to playVod
update for changes to GOMtv site

HTML page has change, update get_vod_set to find the correct elements.

ggox.gom is gone, in its place gox_vod_sfile.cgi, which takes flashvars,
and a few other keys. Notable is 'goxkey' which is a (salted) hash of
the other necessary keys.

The vod page no longer takes ?set= as a get param. As such,
get_vod_set_url now takes a dictionary of parameters (flashvars +
specifics) from vod page.  playVod in default.py (xbmc plugin portion)
is updated to reflect this change.
add support for EHQ, and fallback to HQ, or SQ
gox_params should only be responsible for signing
add EHQ to xbmc settings
braindead URL encode of stream url
stream is now an mp4, not flv