Clean up resources
Add desktop project
Change library project to use Java 1.6
Blue background
`Board` class and `Player` interface
Initialize an empty board
Draw a triangle as an example
Render empty board
Calculate radius of pieces from screen resolution
Implement `Board.move()`
Center the board
Set project matrix
Set viewport transformation
Fix Player 2's color
Simplify calculations for viewport
Create `HumanPlayer`