move default reduction to dcplot.js
ignore mathjax
dcplot artifacts
ignore built packages
Merge branch 'develop' of https://github.com/att/rcloud into develop
Fixes Issue #849 and #850 WRT to delete/modify comments
Update .gitignore

remove trailing / from mathjax folder
Merge pull request #851 from prateek05/gist_comments_issue_849_850

Fixes Issue #849 and #850 with respect to delete/modify comments