Merge tag '1.6' into develop

Release version 1.6
Version bump
Guess Heroku is cooler than OpenShift...
Update dependencies and requirements
Simplify testing and deployment a little bit
More safety in enrolling
Merge tag '1.6.1' into develop

Hotfix version 1.6.1
Merge tag '1.6.2' into develop

Hotfix release 1.6.2
Remove whitespace errors
Logging refinements, #72
Merge branch 'hotfix/1.6.3'
Merge tag '1.6.3' into develop

Hotfix release 1.6.3
Merge branch 'master' into develop
Merge tag '1.6.4' into develop

Hotfix release 1.6.4

Conflicts:
	sauce/lib/runner.py
	setup.py
Test output does not hide comment lines anymore

This finally fixes #44.
Fix column sorting in Test CRC
Merge tag '1.6.5' into develop

Hotfix version 1.6.5
Add submission comment field

Closes #192.
Improvements to submission_table
Disable WYSIHTML5 on Judgement for security

Unlikely, but XSS would be possible.