Bumped version number to 3.2.1-SNAPSHOT
Removed a resolved todo
fixed typo's in example 29, fixed group id 0 not used
Fixed #238: the `change` event sometimes being fired twice on IE10
Removed a weird character
Fixed #254: unclear description of Timeline.setSelection.
Fixed #252: canceling moving an item to another group did not move the item back to the original group.
Added barChart overlap functions
Merge branch 'develop' of https://github.com/almende/vis into develop

Conflicts:
	dist/vis.js
	dist/vis.map
	dist/vis.min.js
fixed pointdrawing with new barchart functionality
Merge branch 'master' into develop

Conflicts:
	bower.json
Updated main field of bower.json to `["dist/vis.min.js", "dist/vis.min.css"]` (see also #256)
Fixed physics stopping conditions, updated history #255
Added customRange for graph2d Y axis
minor doc update
Implemented localization in Timeline and Graph2d
Updated graph2d docs
Replaced most alert(...) with throw new Error(...). Added two more entries to labels
Created a separate locales.js for Network
Implemented localization for Network