documentation fixes
Merge branch 'release/0.6b1' into develop
code clean raises coverage level
Updates travis django versions
Updates travis matrix
Use `ugettext_lazy` where appropriate.
Merge pull request #21 from charettes/patch-1

Use `ugettext_lazy` where appropriate.
updates README
Merge remote-tracking branch 'origin/develop' into pull-requests/17

Conflicts:
	README.rst
updates travis
fixes README's coverall badge
fixes README's coverall badge
Merge branch 'develop' of github.com:saxix/django-concurrency into develop
updates gitignore
fixes travis exclude matrix
fixes #22
Don't use `objects` manager to retrieve an object, use _base_manager instead
fixes typo in documentation
updates travis configuration
updates coverall and travid badges
Merge branch 'develop' of github.com:saxix/django-concurrency into develop

Conflicts:
	.travis.yml
	README.rst