Create the stub for a brush feature.
Adding the basic brush feature.
Additional work on the brush feature.
Merge branch 'master' into brushes

Conflicts:
	d4.js
	test/lib/d4.js
Add a failing test for the rangePoint bug.
This commit fixes issue #18
remove console statements.
Adding additional code to round out the brush feature, which helps determine how
to calculate if a selected object is within the brush's extent. Additionally, I
added two helper methods isNull and isNotNull to d4.base.
Update the brushing code to use the d4 accessor pattern.
Create a new release of d4 0.8.5
add the brush feature to the readme.
rather than returning the brush object itself which will give you an awkward brush.brush.foo() we are passing along the missing function calls as accessors, which is more consistent with how the rest of d4 behaves.
forgot to update the bower tag for the new version.
Remove dirty check on linear scales.
Add a tiny amount of tick padding to keep the axis tick labels from being compressed where they meet.
Adding the line-series-labels feature extension.
additional work on the line series labels.
Merge branch 'master' into development
Additional work on the line series labels.