Fised issue#383

deleted the earlier branch and created a new one, rebased from develope.
Fixed the issue with null check on comments text area while hitting ctrl+enter
add news about only loading rcloud-*.css
default to Text mode for unknown languages in scratchpad

fixes #727
add language indicator if cell language is unknown

partial progress on #718
artifacts
add ace javascript mode
missing file
a few things to make jshint happy
added the same skip-empty fix for the post-comment button

& a few whitespace niceties
Merge branch 'pr/726' into develop

Conflicts:
	htdocs/js/rcloud_bundle.min.js
Merge pull request #2 from att/develop

updates from origin