Merge pull request #34 from Murkantilism/denizDev

Merge Deniz's branch into dev. These changes include:
Added:
-OOB detection
-Score
-End of Round
-Round restart (with countdown)
-Player movement frozen during racket toss
-Jeff's fix for ball physics, rackets
-Player Box Collider 2D's are now triggers
Re-implementing menu system
Adding asset meta files
Merge pull request #45 from Murkantilism/samUIDev

Adding menu system without Library meta files
Added Sam's build settings
Merge denizDev into dev
Merge pull request #46 from Murkantilism/denizDev

Integrated Ryan's artwork, flipped sprites
Minor fixes
Minor input settings fix
Merge pull request #48 from Murkantilism/dev

Grabbing latest dev