Plugin can now pass infolabels to played video

Added support to xbmcprovider to recognize several infolabel parameters in
play function. Several subclasses needed small fix. Using this, when plugin
knows which season/episode TV Show plays, it can pass it via parameters.
Then user when playing video will be able to (for example) find subtitles.
koukni.cz fixed according to new website layout
serialycz: get rid of obsolete code
fixed kouknitest
release