Fix loss of significance for d3.geom.polygon.area.
Set node velocity to zero when fixed.

This should avoid unintended jitter on mouseover.
Merge branch 'geo-area' of https://github.com/jasondavies/d3 into 3.0
Merge branch 'drag-android' of https://github.com/jasondavies/d3 into 3.0
Add placeholder d3.geo.centroid.
Add d3.shuffle. Fixes #948.
s/º/°/g
Merge pull request #949 from jasondavies/°

s/º/°/g
Add d3.geo.centroid.

Polygons are temporarily treated as lines while I work on adding area
weighting.

See #941.
Simplify.
Add d3.geo.area.

See #941.
d3.geo.area: return positive areas.
d3.geo.area: improve handling of tiny polygons.
Remove canvas dependency.
d3.geo.area: fix holes.
Merge branch 'geo-area' of https://github.com/jasondavies/d3 into 3.0
Add d3.geo.interpolate.

Refactor of d3_geo_greatArcInterpolate.
Extract simple vector math from d3_geo_circle.
Remove special case for origin.
More accurate winding order check.