added qualitative color schemes to colorbrewer.js
added qualitative color scales to colorbrewer.css
Merge pull request #1027 from deanmalmgren/master

Add qualitative schemes to colorbrewer.js and colorbrewer.css
Fix projection.clipExtent edge case.

A slight correction to clipLine fixed the problem with points lying
exactly on the clip edge, but in case clipLine(a, b) ever returns false
(no intersections) even though v_=0 and v=1, we treat this as the start
of a line anyway.
Add generated files.
fixed: NaN path coordinates when specifying a function for startAngle of a pie layout
Fix typos in test names.
Refactor d3.geom.voronoi.

See #1145.
Refactor d3.geom.quadtree.

See #1145.
d3.geom.voronoi: return the configured size.
Use local variables for quadtree bounds.

Also, limit size to [width, height].
Rename vertices to points for consistency.
Rename vertex to point for consistency.
Avoid duplicating input for default accessors.
Avoid duplicating input for default accessors.
Store input data in quadtree.
Default x and y to null in quadtree node.
d3.geom.quadtree: pass index to accessor functions.
Slightly shorter.

I blame @mbostock. :)
Coerce accessor results to numbers.

Also, drop *this* context in all cases.