submit/tizen/20151208.020949

-Removed camera_bin, modified encoder_bin. Bug fixes.
-Check if stream can not seek in media_streamer_set_play_position function
-Reorganized client part. Added support of internal subtitles.
-Modified decodebin callbacks.
-Added get_duraiton() API and add evas sink node type.
-fix param checking err of set_property
-add new api about get_duraiton and add evas sink node type
-Add autoplug/manual mode in VoIP. Fix memory leaks.
-Implemented get_play_position() API