Added filter and cluster method (halfway applying them)
Added example to test clustering
Code restructured quite drastically. (Preparation for modularizing the code, and for implementing clustering)
First basic clustering implementation (far from finished though)
Fixed a rendering instability with clustering. Set clustering to off by default.
Added clustering for ranges
Fixed issue #35. DataTable columns may now have their name defined as label or id, and the first three columns can have any order now. More robust and flexible.
Simplified the method mapColumnIds
Fixed two examples not having correct data column naming
Added functionality to make events editable/readonly on individual basis
changelog updated with new editable feature
created option showAnimationControls
updated example
Added a new scale "WEEKDAY", which shows the weekday in the minor label (issue #37)
Renamed ClusterFactory to ClusterGenerator
Simplified the filtering of items and clusters to be rendered, resulting in better performance and easier code.
fixed issue #41: jar files where named incorrectly
Fix #42: Timeline events shift position when updated.

Timeline.filterItems will now only push events onto the show queue if
they are not already in there, to prevent overlap miscalculation when
the stackEvents option is enabled.
More correct items overlapping calculation
Add method to add new item types