Remove welcome to quill writer

See #164 1
Teachers, create your own activities.

See #164
Add youtube video under jumbotron

See #164
Add more copy

See #164
Get list of public prompts grouped by subject

See #164
Show list of subjects, and fire change listener

See #164
Reorder

See #164
Show list of activities based on subject

On click go to the activity chosen

See #164
Show activities in a select

Add button and remove list listener

See #164
Only show start button if activity is selected.

Closes #164
Merge branch 'feature/new-start-page' into develop
1.0.1