Merge pull request #78 from atungare/dev

fix bug so id of challenged friend is correctly written to DB
Redid front-page
Updated login button
Merge pull request #80 from dhruvarora/dev

Redid front-page
add a way to query a users games
remove test getChallenge query
show game status in button text
redirect to game when a challenge is accepted
games are completed and removed from a user's currentGames when both players have played
refactor removal of game from users' currentGames
Merge pull request #82 from jlburkhead/challenges

Challenges