add dc.pluck
pass group to data and use pluck
fix number display data function
fix #341
rebuild artifacts
rebuild stock example docs
build dc.js for travis testing
add CONTRIBUTING.md
rebuilt stock docs, testing contribtions notice
Merge pull request #344 from NickQiZhu/test

rebuilt stock docs, testing contribtions notice
add merge instructions
fix typo
add Issues Submission Guildlines
fix #338
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