removed set rails version from Gemfile. Now using most recent Rails version.
Updated tests to pass after updating rails version.

modified:   Gemfile
modified:   Gemfile.lock
modified:   app/models/audio_recording.rb
modified:   app/models/saved_search.rb
modified:   spec/factories/analysis_job_factory.rb
modified:   spec/factories/analysis_script_factory.rb
modified:   spec/factories/audio_recording_factory.rb
modified:   spec/factories/bookmark_factory.rb
modified:   spec/factories/permission_factory.rb
modified:   spec/factories/project_factory.rb
modified:   spec/factories/saved_search_factory.rb
modified:   spec/factories/tag_factory.rb
Trying to fix sass precompile problem.

modified:   app/assets/stylesheets/application.css.scss
renamed:    vendor/assets/stylesheets/hint.css/_hint.scss -> vendor/assets/stylesheets/hint.css/_hint.css.scss
Merge branch 'master' of https://github.com/QutBioacousticsResearchGroup/bioacoustic-workbench