Merge pull request #36 from guimesmo/master

Added compatibility with django versions 1.6. Fixed some minor bugs
Start suport to django 1.7.1
Add tox
Update README.rst
delete RELEASES.rst
Merge branch 'master' of github.com:valdergallo/data-importer
Update README.rst
Fix import path
fix port django 1.7
Fix get long description
LICENSE
ignore tox files
bugfix for new openpyxl
add tox requirements
update maker
new version
readme fix
bugfix download tag
Update travis info
Fix travis