Major update

Added Spritesheet player
Added new modes
Added shelljs sprite sheet exporter
Fixes
Merge branch 'master' of github.com:davidpaulrosser/img-sequencer into develop

Conflicts:
	.gitignore
	examples/modes.html
	examples/sequence.html
	lib/index.js
	makefile
	package.json
	scripts/exporter.py
	src/index.coffee