symlink public/assets

capistrano-rails adds public/assets to linked_dirs, but we overwrite it:
https://github.com/capistrano/rails/blob/v1.1.1/lib/capistrano/tasks/assets.rake#L99
fix page title error
Merge pull request #844 from ontohub/825-hide_other_dropdown_menus

Hide other drop down menus when a new drop down menu is opened
Merge pull request #812 from ontohub/23-codemirror_integration

23 codemirror integration
Merge pull request #854 from ontohub/hotfix_page_title_error

fix page title error
Merge branch 'staging' into 813-tests_file_edit
Merge pull request #845 from ontohub/symlink_assets

symlink public/assets
use bundled rake
Merge pull request #858 from ontohub/hotfix-start_script_wrong_rake

use bundled rake
improve readablity, switch from describe to context
give more precise test description
Merge pull request #830 from ontohub/813-tests_file_edit

813 tests file edit
add sidekiq rake tasks
add rake task for starting development environment
modify start-development script to use rake tasks
Merge branch '222-565-rake_task_for_solr_sidekiq_webrick' into develop