Merge pull request #1 from Cahersan/master

My contribution to django-formulator
Merge pull request #2 from Cahersan/master

Merging cahersan branch
pep8 + hstore refactor
travis compat and tests refactor
travis refactor and compat
Modified .gitignore
Merged in: https://github.com/ashwoods/django-formulator
pep8
Merge https://github.com/ashwoods/django-formulator
Added repeat_min attribute. Modified slugs.
Implemented repeat_max for fields