Update README.md
#3 Add: connect flag to ServicePool and ServiceMixinPool __init__
#3 Update: ServicePool raises a NotConnectedError on non connected service request
#3 Add tests for service pool connection flag
Add a tox.ini
Add travis file
Update travis package dependencies
Merge pull request #7 from botify-labs/feature/pool_connections_activation_flag

Feature/pool connections activation flag