set minPxPerSec on wavesurfer instance to facilitate zooming
added "redraw" event to wavesurfer instance; updated timeline plugin to handle updated minPxPerSec properly
Merge branch 'kp-master' into zoom

Conflicts:
	build/wavesurfer-js-map.json
	build/wavesurfer.amd.js
	build/wavesurfer.min.js
quotation style tweak in timeline plugin
Merge pull request #132 from instajams/zoom

Handle minPxPerSec differently to allow for zooming