v0.2.9

• Add d3.interrupt.

v0.2.8

• Change selection.transition to inherit timing from the nearest ancestor (#40).

v0.2.7

• Fix transition.attrTween when the value is null.
• Fix transition.styleTween when the value is null.
• Fix transition.tween when the value is null.
• Fix transition.on when the callback is null.

v0.2.6

• Fix transition.remove when multiple names are in use (#38).
• Fix selection.interrupt during a start event.
• Fix selection.interrupt during a tween on its final frame.
• Optimize the interpolator used by transition.attr and transition.style.
• Add hundreds of tests (#20).

v0.2.5

• Update d3-interpolate to 0.7.

v0.2.4

• Fix transition.remove during a start event.
• Allow interrupt and end listeners to be modified up to and during the start event.

v0.2.3

• Update d3-interpolate to 0.6.

v0.2.2

• Synchronously evaluate target values in transition.{attr,style,text} (#37).

v0.2.1

• Fix transition.selectAll.

v0.2.0

• Transitions are now immutable! (See d3-selection 0.7 for more.)
• Added transition.selection.
• Added transition.merge.
• Changed transition.filter to preserve index.