Add size attrib
Reorder code
Add bitmap rendering if image available
Fix type mismatch
Reorder code
Add drone image
Centralize constants for ease of modification
Migrate vals to BattleConstants
Add more constants
Rotate images
Implement bitmap rotation when rendering BattleObject
Add moveHeading attrib
Set moveHeading when moving
Add method to calculate heading for moving from point A to point B
Migrate values to BattleConstants class
Fix renderBattleObject() to handle float object sizes
Update constant
Add constants
Implement size concept when selecting buildUnit() location
Add size concept when occupying coords on battlefield