Bad implementation of waveform...
(cherry picked from commit e4a48a79d5628f48f37507abed90fb7b04fb9859)
Preload waveforms into memory

Horrible memory-wise, but fixes issue where playback would freeze when
moving new tracks into decks.
Added basic equalizer gui elements and put dummy callbacks
Removed util directory - not relevant after switching table resizing method
Removed addpath for util