Sprites of x-wing added.
New Animation class.
Some new sprites.
Canvas is 800x600 now.

init() method added, some code were moved to init() from run() method;
I really don't know why i did this commit,
 but  import changed.
New sprite for lives.
Lives -- sprites now.
New sprites;
Enemies are bigger;
Some changes in GamePanel with calling methods;
Too much non-working changes in Player class;