cleanup test issues
Update CONTRIBUTING.md
Lint Cleanup
add lint
Force anchor name to use string. Related to #350
add unique counter to fix #350
Use a single gobal ID for each chart
fix broken pie chart example
Merge branch 'master' of github.com:NickQiZhu/dc.js
implement scatterplot update logic
properly abstract all d.data values from user callbacks
add symbol size to scatterplot
tweak scatterplot transition
add color fill to scatterplot
Merge branch 'master' of github.com:NickQiZhu/dc.js
improve scatterplot performance