Implement new sponsor registration

[dominikglandorf]

• [x] Change form fields

  • [x] Sponsor.handlebars
  • [x] Profile.handlebars ab 195

• [x] Determine API endpoint and check fields

• [x] Adapt profile picture upload to cloudinary upload

• [x] Prefill form fiels

• [x] Change page title "Anmeldung zu BreakOut 2017

• [x] Englische Übersetzungen

• Check Terms of Use for sponsorships: Up to date.

• What does "Hide profile in public" mean? Discuss with team finances!

• Select role after first selection still possible? Double roles possible.

• Gender policy? Not yet, coming soon!

[florianschmidt1994]

@dominikglandorf can we close this? I think?

[dominikglandorf]

Check :)