Lots of smaller mobile fixes

* region can be deactivated in activeadmin
* smaller border around page content
* logo in top bar now with better spacing
* after signup is the map, not the profile
* sets the region in session when choosing one
Merge pull request #451 from hacken-in/small-dropdown-fixes

Lots of smaller mobile fixes
Migrate existing Cronjobs to Whenever

(closes #452)
Adds sitemap.xml
Remove all code related to participating an event as an anonymous user

The code is currently unused. There are some notes about re-integrating
this feature, but I think in this case we should rebuild it. The code is
pretty unwieldy.
Merge pull request #456 from robinboening/feature/sitemap

Adds sitemap.xml
master, please deploy :wink:
added mount to shelly disk
you should read what you did, @bitboxer
uploadS :sob:
Use live Domain for Shelly Production

IT'S HAPPENING!
Use "hacken.in" has the *main* domain
enforcing ssl, fixing loading of flattr + fonts
Merge pull request #469 from hacken-in/force-ssl

enforcing ssl, fixing loading of flattr + fonts
hopefully fixing auth
Merge pull request #475 from hacken-in/fixing-devise

hopefully fixing auth
Use tiles with protocol relative URLs, avoid mixed content
Merge pull request #454 from hacken-in/452-migrate-cronjobs

Migrate existing Cronjobs to Whenever
Merge pull request #478 from til/openstreetmap-ssl-tiles

Use tiles with protocol relative URLs, avoid mixed content
Temporary hotfix for shellycloud-forwarded hostname (refs #477)