made imagedistro optional (#9)

close #7

Merge pull request #7 from fabsi88/feature/6-add-model-info

added model attribute

added powerstate method without param for fetching standby state

added about and remotecontrol call to support play / pause

Merge pull request #2 from fabsi88/feature/epg-search

added epg search

add support for zap up and down

initial commit