Change github link

Remove github references.

Add report issue link
Notify user when javascript engine is disabled
Merge pull request #66 from tdurieux/no-script

[imp #60]  Notify user when javascript engine is disabled
Merge branch 'github-link' of github.com:tdurieux/bluelatex into tdurieux-github-link

Conflicts:
	blue-web/src/main/resources/webapp/css/css.min.css
Merge branch 'tdurieux-github-link'