Changes enumerated below
- Added Legends in pie charts
- Fixed issue in getClassName function
- Added custom colour palette config
Merge branch 'master' of https://github.com/Imaginea/uvCharts

Conflicts:
	src/gfx/graph.js
	src/gfx/pie.js
	src/gfx/waterfall.js
Merge pull request #29 from shrimalmadhur/master

Changes enumerated in comment box