Adjusting bee behavior

Fixed collision detection for Bee

Adding enemy collision behavior

Bee now seeks the player if they are within 4 blocks

Refactored map entity construction to use strategy pattern.

Added a bee enemy that is created from the XML spec

Title text now fades away

Level title now auto centers itself

Allowing effect to auto remove GUI level title

MapManager now notifies when map is loaded

Added some intro music.

Fixed double-jump bug

Score now decrements by one every half second

Added label for score countdown

Moved responsibility of constructing GUI away from GUI manager