Merge pull request #36 from aellawind/master

prettier login page
Fix battle logic
Add ability to add friends from user database
Add leaderboard functionality
Add refresh to battle screen
Add battle history
Add boss battles functionality
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