Create an easy way to add stages to brick breaker

[brezende]

Something like:
Some files for stages, as the following example:

-- stage1.stg
### ### ### ### ###
### @@@ @@@ @@@ ###
### ### ### ### ###

Those files would describe how blocks should be laid out on the stage. Each three character combination is the code for a different block that should also be specified on a separate file, as in the following example:

//RegularBlock.js
exports.symbol = "###";
exports.type = "Poligon";
exports.transform = function (block) {
        block.draw_colision_area      = false;
        block.solid                   = true;
        block.do_not_colide_with      = ["Border"];
        block.type                    = "Block";
        block.color                   = "#000000";
        block.add_vertice(-13, 0);
        block.add_vertice(12, 0);
        block.add_vertice(12, 15);
        block.add_vertice(-13, 15);
        block.going2destroy = going2destroy;
        block.on_colide_with("ball", function(bola) {});
};

And that should be enough to load the stages.