check presence of attributes in job_offers, #6
check if start date is before end date in job offers #6
added checkboxes for programming languages #6

issue: only saves one language
refactored model test
Merge branch 'crud-job-offers' of https://github.com/tkowark/hpi-hiwi-portal into crud-job-offers
added capybara gem + updated spec_helper
fixed issue of last commit #6
added programming languages to show, #5 made checkbox tag clickable #6
Merge branch 'develop-ja' of https://github.com/tkowark/hpi-hiwi-portal into crud-job-offers

Conflicts:
	app/models/job_offer.rb
Merge branch 'crud-job-offers' of https://github.com/tkowark/hpi-hiwi-portal into crud-job-offers
Merge pull request #20 from ephe-meral/add-gem-capybara

Added capybara gem + updated spec_helper to use it
merged develop
added factorygirl gem + updated spec_helper
added missing Gemfile.lock
Merge pull request #22 from ephe-meral/add-gem-factory-girl

Added factorygirl gem + updated spec_helper
Merge branch 'develop' into develop-ja
added acceptance tests #4
added Sidebar link to jobs Overview
Merge branch 'develop-ja' of https://github.com/tkowark/hpi-hiwi-portal into develop-ja
Merge branch 'develop-ja' into sort-job-offers