Add package diagram.
Add package diagram.

PedroRomanoBarbosa/libgdx,PedroRomanoBarbosa/libgdx,PedroRomanoBarbosa/libgdx,PedroRomanoBarbosa/libgdx,PedroRomanoBarbosa/libgdx,PedroRomanoBarbosa/libgdx,PedroRomanoBarbosa/libgdx,PedroRomanoBarbosa/libgdx