Add coveralls support and remove old junitxml coverage flags.
Add Travis and Coveralls badges to README.
Add newline to requirements file.
Omit South migration files from coverage reports.
Second attempt at ignoring migrations.
Merge branch 'feature/issue-731-add-coveralls' into develop
Merge branch 'develop' into feature/issue-669-billing-module-create

Conflicts:
	.travis.yml