fix bug 781603 - Upgrade ACE editor
Merge pull request #1148 from darkwing/ace-upgrade

fix bug 781603 - Upgrade ACE editor
fix bug 880659 - skip compare_url for revs with no previous rev
fix bug 880803 - Add FontAwesome, replace first icons
Merge pull request #1150 from groovecoder/notification-email-bug-880659

fix bug 880659 - skip compare_url for revs with no previous rev
Merge pull request #1151 from darkwing/font-awesome-880803

fix bug 880803 - Add FontAwesome, replace first icons