Added "git add" to "fab propagate_db" task...

So you will not accidentally forget to add the db.json file to your git commit.
Refactored Word Model/Collection.
Finished refactor of word collection, updates to translate_word task:

Now, when you hover over the sample Greek sentence, you see the translation in your locale.
Fixes for reader needed after word model/collection refactor.
Improvements to translate_word task.
Merge branch 'master' into development
Added typegeek submodule.
Merge branch 'master' into development
Subproject commit.
Merge branch 'master' into development
Support for typing Greek in lessons screen. Resolves #51.
Merge pull request #53 from OpenPhilology/development

Refactoring, support for typing Greek.