Fixed "callable" and removed ApplyHelper (will go to the tools file)
  Moved funcbuilder to a new directory
  Added tools.py with tools related to FuncBuilder
  Added py_dot environment. It Supports:
  - Functions with:
    - Conditions - if...elif...else.
    - Loops "for" with one variable.
  - Classes.
  - Django-like syntax to set attributes on function call.
     set(self__x = 10) => self.x = 10

  It requires FuncBuilder object (named var) to make functions.

  Added some tests.
  Added readme with info about py_dot and funcbuilder
  Fixed version number