- added "sanitize" gem
- implemented "sanitize_html" to strip all html from a string except stuff from a whitelist
--> this allows us to still use bootsy but work around the security risks
- added custom whitelist to sanitize_html #219
- added test for "sanitize_html" #293
- adjusted standard buttons for bootsy, removing the non-functional image button and adding the view-as-html button
$- added test for 'sanitize_html' #219 \n- adjusted standard buttons for bootsy, removing the non-functional image button and adding the view-as-html button
added test for 'sanitize_html' #219
- changed default bootsy settings to remove the non-functional image button, adding the view-as-html button
added vacant_posts to the permitted parameters in the job_offer controller
Merge branch 'develop-ja' of https://github.com/tkowark/hpi-hiwi-portal into develop-ja
changed default vacant posts value back to 1
Merge remote-tracking branch 'origin/develop' into develop-ja

Conflicts:
	app/controllers/job_offers_controller.rb
	app/views/job_offers/_form.html.erb
	app/views/job_offers/show.html.erb
Merge remote-tracking branch 'origin/develop' into develop-ja
fixed birthdate selects on students edit, added Text when your search yields no results #281
allow students to use the matching job offers button
changed translation #281
Merge pull request #298 from tkowark/develop-ja

Develop ja
merged and fixed ability