adding redis-server and VUMITEST_REDIS_DB env flag
telling pip to also use mirrors for grabbing requirements specified in a package
fixing YAML
Merge branch 'develop' into feature/issue-246-travis-real-redis

Conflicts:
	.travis.yml
Merge branch 'develop' into feature/issue-246-travis-real-redis
Merge branch 'develop' into feature/issue-246-travis-real-redis
Merge branch 'develop' into feature/issue-246-travis-real-redis
Merge branch 'feature/issue-690-better-test-cleanup' into feature/issue-246-travis-real-redis
Merge branch 'feature/issue-690-better-test-cleanup' into feature/issue-246-travis-real-redis
Some redis-related fixes.
Merge branch 'develop' into feature/issue-246-travis-real-redis
Last few redis changes.
Merge branch 'develop' into feature/issue-246-travis-real-redis
Merge branch 'develop' into feature/issue-246-travis-real-redis
Use TokenManager we already have on VumiApi.
Merge branch 'feature/issue-246-travis-real-redis' into develop
Merge branch 'develop' of github.com:praekelt/vumi-go into develop