WC: make all the properties observable
WC: rename <datacolumn> to <hot-column>
upgrade Polymer to v0.0.20130912
upgrade to current Polymer syntax
WC: make <hot-column> properties observable
Merge branch 'feature/webComponentMutation' into develop
feature: new plugin hook `afterRenderer`
feature: expose Handsontable.Dom helper
Handsontable 0.9.19
Merge branch 'hotfix/afterRendererHook' into develop