added Movement class, to remove duplicate code
Merge branch 'master' of https://github.com/PauloGandraSousa/EAPLI_2013_PL_2DI
Merge branch 'master' of https://github.com/PauloGandraSousa/EAPLI_2013_PL_2DI
Merge branch 'master' of https://github.com/PauloGandraSousa/EAPLI_2013_PL_2DI