player: fix repeat mode setting
player: set sensitivity of prev/next button
player: set image for playbutton correctly
player: sensitive -> get/set_sensitive
player: correct params for _onProgressScaleEvent
player: corect params for onProgressScaleButtonReleased
player: don't set priority in timeout_add
widgets: correctly hide columns
player: correctly check for previous track to exist
player: don't set play button image when its not needed
player: correctly set next/previous track
player: correct params for query_duration
player: correctly verify for playing state
player: set correct images for play button
player: switch to next song at the end of the track
player: fix shiffle mode
player: set icon for repeat state
Merge pull request #35 from roignac/master

Playback fixes