Axis now updates on data change.
Documentation update.
Added tick rotation support to Axis.
New documentation.
Added missing documentation to the Axis code.
Updated distribution file and documentation.
Added documentation to some changes.
Added getLength to the Accessor.
Merge pull request #37 from dendril/axisBugFix

1. Fixed axis update after redraw the charts with new data.
2. Added support for ticks rotation.