Added tests for show action in controller specs. Added tests for home controller. Added seeds for permissions and progress.
Added ability to select a random item from all those available, for using in a test.
More information is printed by the audio tests when they fail.

modified:   Gemfile
modified:   Gemfile.lock
modified:   app/controllers/home_controller.rb
modified:   app/models/permission.rb
modified:   db/development_seeds.rb
modified:   spec/controllers/analysis_items_controller_spec.rb
modified:   spec/controllers/analysis_jobs_controller_spec.rb
modified:   spec/controllers/analysis_scripts_controller_spec.rb
modified:   spec/controllers/audio_events_controller_spec.rb
modified:   spec/controllers/audio_recordings_controller_spec.rb
modified:   spec/controllers/bookmarks_controller_spec.rb
modified:   spec/controllers/home_controller_spec.rb
modified:   spec/controllers/permissions_controller_spec.rb
modified:   spec/controllers/photos_controller_spec.rb
modified:   spec/controllers/progresses_controller_spec.rb
modified:   spec/controllers/projects_controller_spec.rb
modified:   spec/controllers/saved_searches_controller_spec.rb
modified:   spec/controllers/sites_controller_spec.rb
modified:   spec/controllers/tags_controller_spec.rb
modified:   spec/controllers/users_controller_spec.rb
modified:   spec/models/class_search_spec.rb
modified:   spec/models/module_audio_spec.rb
modified:   spec/spec_helper.rb
modified:   spec/support/shared_api_examples.rb