first setup.py approach for pip install

* created setup.py file for install with: `pip install -e .`
* And remove the script with: `pip uninstall qtextasdata`
* changed q script name to q.py, maybe this broke other installs
* In q.py main function is added, because is necessary for a pip
  install.
* a `bin/__init__.py` file is necessary for a pip install, like python module structure. 
* In setup.py the package name is qtextasdata, because in pypi q
  package name is already taken.

the information in `setup.py` is the first approximation to a more complete information.