Adding GKS.GS provider

Add gks.gs provider which search only for new VOSTFR episodes
Correct error in config_providers.tmpl
First try to adapt gks.gs provider to mozvip fork
Improve gks.gs provider
First Fully Working version of gks.gs provider
Improve categories handling
Merge pull request #81 from Kyah/gks_gs_dev

Add GKS.GS Provider