fixed bug in begin recording time
use lecture time for audio
now displays graph display
timeline is formatted
added a cursor to the background
added callbacks for shift_segment and crop_segment
added visual cues for dragging
bug fix
Merge branch 'jonathan' of github.com-jonathanwangmit:aehsu/pentimento into jonathan
refactored code to follow new MVC design
updated mvc structure
added segment placing logic
added insert segment
fixed some logic in audio segment placing
drag collision now works visually, but is not yet hooked up to backend
fixed bugs with self collisionwq
fixed update to getUserMedia
added hover border highlight
fixed some border highlight issues
fixed minor bug