Click events for current oesmith/master
Pin grunt (so travis works).
WIP: interval improvements
#199, added behaveLikeLine and fillOpacity options, refactored morris.line to separate line and point draw operation
Merge branch 'master' into event-handling

Conflicts:
	lib/morris.donut.coffee
	morris.js
	morris.min.js
Better automatic y-labelling.
Merge branch '199-area' of https://github.com/tiraeth/morris.js

Conflicts:
	morris.min.js
Merge branch 'event-handling' of https://github.com/tiraeth/morris.js

Conflicts:
	morris.min.js
Remove unused argument.
Fix defaults check.