Use an object of stories to choose from

See #93
Read stories from a local json file

See #93
Add a second json story

See #93
Update stories.json
make dist/
Merge remote-tracking branch 'peter/patch-1' into feature/static-engage-ny-vocab
Run json_pp on stories.json
Make dist/
Add Ryans stories
make a dist/
Add activity prompt to the main form
Add activityPrompt to / and /game urls

This allows the auto pass through if they are provided.
Use the activity prompt param to identify.
Update dist/

Closes #93
Merge branch 'feature/static-engage-ny-vocab' into develop
Make dist/ release
0.1.8