Save Frankys E-Mail account
Created gui and emails for #40 and #41; changed some locations according to comment in #120
Merge branch 'develop' into develop-js-mail
Send E-Mails, jsut need to writte Tests now
Merge branch 'develop' of https://github.com/tkowark/hpi-hiwi-portal into develop-js-mail

Conflicts:
	app/controllers/students_controller.rb
	app/models/user.rb
	config/locales/views/students/de.yml
	config/locales/views/students/en.yml
Save Frankys E-Mail account
Seed updated. Now every Job Offer has a responsible Person
Fixed some errors.
edited seed file + one additional test for #208
made responsible user mandatory for #203
added some more information to job_offer mail for #120
made edit unavailable for jobs that aren't open or pending for #212
#195 done Enhancement
#184 Made first/lastname immutable in the _form, since this was changed back by some refactoring in #111
added multiupload to application mailer
fixed link issue in application mail for responsible user
Merge branch 'develop-ja' of https://github.com/tkowark/hpi-hiwi-portal into develop-ja
#187 Added asterisks and conditional description
changed redirect behaviour on sign in for #183
Merge remote-tracking branch 'origin/develop' into develop-ak
small refactoring