Add blank lines at end of file
Add space after # in comment
Fix pep8 indentations errors
Fix line lenghts > 120
Check pep8 with travis

An `.editorconfig` file has been added for unifying the coding style
for different editors and IDEs.
Fix flake8 import errors

- Removed unused imports in files
- Added `__all__` variables in `__init__.py` and `spirit_tags.py`
- Added flake8 check to `.travis`
Merge pull request #28 from benjaminabel/pep8-check

Pep8 check
gitattributes LF