REIMPLEMENTATION grammata 0.2.0.14

for now implemented the logical core language.
    modified:   src/Grammata/Machine/Core.hs
    modified:   src/Grammata/Machine/Core/Class.hs
    modified:   src/Grammata/Machine/Core/Imperative.hs
    modified:   src/Grammata/Machine/Core/Logical.hs

to do
    Handle the problem with a infinite list of solutions, caused by mapM.