adding RangeSeekBar librari
work on trim ui

work on trim ui
trim slider shows up in actionmode
add trimStart and trimEnd to model
adding Utils; toastOnUiThread helper method
move preview clip start to be a click on the video player;  trim controls load and save to db;
return to previously selected clip after previewing
make PreviewVideoView take a Media[] instead of a path String[]
order tab preview now uses trim points
adding duration to Media table and model
make export use trimmed clips info
if Media object didn't have duration, set it when we know it
trim slider right side should default to 100%
add Utils.convertTimeStringToInt
hide full control bar instead of just seekbar
trigger preview when adjusting trim points
fix trim cancel not working
add submodule for Trim function: RangeSeekBar