updated download to svg method with canvas support check and js function support checks
Merge pull request #43 from hashd/master

Updated dist files and few misc fixes
Update readme.md
adding banner
banner addition
Added Show/Hide legend config property. Fixed issue for area chart.
Merge pull request #48 from shrimalmadhur/master

Added Show/Hide legend config property. Fixed issue for area chart.
Merged changes from ksnov