Can subscribe after search
Can add game. Does not yet invite friends.

Towards #3.
Return to listing via clicking "X" up top
Do not rerun computation during route unloading
Collect and check invited friends' email addresses
Simplify email address collection
Select rather than input players requested

Simulate mobile view via `max-width` css.
Enable edit view.
Remove user player along with non-user friends

Concerns #3
Can cancel game
Don't cut off left edge in mobile browser
Fix cancellation of add/edit game on mobile
Create Meteor.users for development mode
Remove non-authenticable friends when leaving game
Email new user if added to game as friend