Move compiler to C

[fabiensiron]

The tinypy compiler is currently composed of 3 python's modules: tokenize.py, parser.py and encode.py.
The compiler is already boostrapped in bc.c under a array of tpc (tinypy bytecode).
If the compiler is moved in C, the speed is improved and the debugging is easier.
Plus, one can correct some grammar mistakes: empty file, one litteral...