Cron task to delete expired images
Fix #18
Fix #8
* typos
* remove unbreakable spaces
Merge branch 'jcb-master' into dev

Conflicts:
	README.md
Add HTTP headers Expires and Content-Cache
Add contributors
Add Changelog
Put methods in separate controller
Add improved xcf logo
Improve CORS
Small UI changes
Add remote port in IP log
Bugfix for noscript version
Fix #22

Files encryption
Better HTML compatibility
Small UI changes
Update png logo from blurried xcf logo
Better maximum delay handling (related to issue #8)