Merge pull request #28 from priyankadudani/master

 Fixed issue #27
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
Fixed deepclone function for extending empty array and object
Merge pull request #30 from shrimalmadhur/master

Fixed deepclone function for extending empty array and object
Added few config options

- Added sufix and prefix for label
- Added opacity option for chart
- Added configuration to show or hide ticks and subticks
- Fixed issue when giving custom config with download option
Merge branch 'master' of github.com:Imaginea/uvCharts

Conflicts:
	src/gfx/graph.js
	src/util/config.js