Adds new constants

Constants for GUI Size (desktop)
Constant for number of initial lives
Recompiled
Removes ALL related to test objects

Removes testSprites (Sprite[]) and selectedSprite (Sprite)
Removes initTestObjects()
Removes updateTestObjects()
Removes moveSelectedObject()
Removes the rendering of the test objects
Changes implementation to follow AbstractGameObjects instad Sprites
Adds a font (Arial) to the Assets class
Adds font resource files
Adds all the GUI

The GUI haves the lives counter, score counter and also and FPS counter to show performance