tabela de atributos do jogo eh definida e controlada por arquivo json. closes #2
making my own checks as java asserts didnt work well for me
attribute class - was not committed before
adapted geovanecomp's commits 93883ed-3138c9dce
moved PetAttributes out of utils as it is central to the code
it now compiles
more cleanups
futher cleaning
cleaned up todo
pet rewrite: beat_ and update in petworld
simple petworld stub done, without any systems ye
basic velocity and animator stub for pet