Merge branch 'master' of https://github.com/Linkurious/sigma.js
Add renderers.edgeLabels
Update README.md
Update Gruntfile
Refactor utils.getQuadraticControlPoint
Fix https://github.com/Linkurious/sigma.js/issues/2
Fix README
Fix https://github.com/Linkurious/sigma.js/issues/7
The mighty blackholish ForceAtlas2 version
Refining
Optimizing donut
It seems the barnes-hut is now working
Merge branch 'master' into HEAD

Conflicts:
	src/utils/sigma.utils.js
Removed duplicated functions from sigma.utils.js

The functions getQuadraticControlPoint, getPointOnQuadraticCurve, getPointOnBezierCurve and getSelfLoopControlPoints were duplicated in sigma.utils.js, due to some weird git merging. I removed the oldest definition.
Fix sigma.js/issues/383
Added the "mouseWheelEnabled" setting

Setting it to false will prevent the mouse wheel to zoom in or out. This fixes #405.
fixed random colors in api-candy.html
Option to skip quadtrees indexation in refresh

From now, if you call `s.refresh({ skipIndexation: true })`, the quadtrees indexation will be skipped.
It is especially useful if you need the renderer to reprocess (with WebGL, for instance) but you have not changed any position related attribute (labels, colors, ...).
Fixes #397.
a different tree impl. for Barnes Hut
minor fix in WebGL renderer