Birds

Includes trial character select etc
Beak Collision

Beaks now collide.  Also small gravity tweaks.
For Tom to take home

Customization is starting to work!
New Customization Screen + Fixed Spawn Spinning
Lightning PowerUp

Lightning PowerUp is working but there is a bug explained on Trello.
Invulnerability

Implemented invulnerability powerup.  Fixed lightning powerup including
the icon.
Fire Trail

Implemented Fire Trail.  Changed size of invulnerability icon.  Changed
invulnerability so it works with the fire trail as well.
Merge pull request #2 from tomob95/Experimentation

Experimentation