Add docstrings for existing tasks
Add new copy task
Nuke skel comment
I even had sys.exit in here before, what was I thinking
Merge pull request #342 from urbanairship/task-tweaks

Add task docstrings & a copy task.
Expand metadata into a separate field, so we don't overwrite template tags on save
Merge pull request #344 from urbanairship/fix-metadata-template-expansion

Expand metadata into a separate field, so we don't overwrite template tags on save
Update README.md with Docker instructions
Merge branch 'master' of github.com:urbanairship/tessera into issue-250-application-root
Use `url_for()` to get proper hrefs to Flask routes