WIP refactor SingleCard*
...
get singleCard to work
WIP: progress on SingleCardStore/PlayCardStore refactor
CardStore option 1: export the class AND the singleton
Revert "CardStore option 1: export the class AND the singleton"

This reverts commit 2b584c3555cc0355bffec68f3da74849f53d1b9e.
fixed single card view... still got bugs
fixed comments on SingleCard
fix card flipping and improve gestures
fixing lots of bugs related to comments
More comments related fixes

- card is z-indexed above comments
- number of comments and new comment field switch out without visually
  interfering with one another
- comments are scrollable
Fixes to nav, comments, single cards

- Fix back button in single card navigation
- Fix next button in play navigation
- Finish implementing login-required messages for single cards
- Can't submit empty comments... hitting enter in empty box closes it
  (yay!). Escape should work too but doesn't.
- Fix comment input z-index
added new IP for redirectUrl
Merge branch 'overhaul'