Update travis config to match 1.3 branch
Update README
Prevent aborting installation process just because we couldn't find

settings module, we don't need that in installation process.
Add error traceback to logging.error
Catch ImproperlyConfigured and log the error.
Update requirements for django 1.5 compatible dependencies
Merge pull request #1 from django-nonrel/mongodb-engine-1.5-beta

Mongodb engine 1.5 beta