Merge pull request #37 from fatchicken007/master

Add functionality to leaderboard, battle history and add friends screen
Remove back button on character screen
Merge pull request #38 from conorfennell/back

Remove back button on character screen
Start separating out quests from solo missions
Start working on the quest logic
Merge pull request #40 from aellawind/master

Adding Quests Implementation
Remove unnecessary string
Merge pull request #41 from aellawind/master

Remove unnecessary string
Checks for username and added loading for data
Merge pull request #39 from conorfennell/login

Checks for username and added loading for data
Check that battle request doesn't already exist
Fix friends and leaderboard list from displaying friends that are not game users
Refactor code for selling equipment
Add hp recovery from fitbit calculated sleep
Refactor adding attributes after battle win
Remove ng-hide on refresher
Fix alerts to load only once and not to stack on refresh
Transition to battle screen when alert is clicked
Update player attributes to include fitbit data in calculations
Update character bonus attributes