Added ControlStyles toggle. Added 'Basic' Controls.

The new 'Basic' style lets the player move with pretty much ignored
interaction from gravity and momentum and ignores SwimStrokes.
Normal has reduced gravity effects on movement, but the player can kinda
drift around.
Advanced has a lot more momentum carry from jumps and is much more
'slippery'. Should probably add an options menu or a toggle button for
the player to switch modes at will.