Added basic handling for Boost item.

Player charges forward for 8 seconds while treadmill moves
at max speed.
Added FX_Boost script to spoof a trail.
Cleaned up handling of Boost for player. Hooked it into Wildcards.

Made FX_Boost to manage the BoostLines and help spawn the explosion
when they are done emitting. Spawned FX_Boost for better memory
management.
Removed unused ObjectName
Merge branch 'wildcard_boost'

Conflicts:
	Assets/Scripts/Player.cs
	Assets/Scripts/Strings/ItemNames.cs