[V Experimental 0.0.3] Variables'n'types
- Add variables declaration and assignments
- Implement types: nil, char, string, number, boolean, function and module
- Add new method
writeiniomodule - New supported symbols: comma, colon, equality, minus
- Change container type in lex environment from Value to Binding (Value with type)
- Add new literals handlers: nil, char, float-number, int-number, boolean