Fix Deleting Pomodoros spec
Fix Managing Projects spec
New Capybara helper: create_project
Pomodoros#index: prepare for multiple actions in one form
Project has many pomodoros
Pomodoro#has_project?
Rewrite Managing Projects spec
Add pomodoros#assign action
Set the name of the select tag to "project"
Add another column to the pomodoros table
Merge branch 'feature/assigning_pomodoros' into develop