+++++++++++++++++++
**Improvements**
- Removed polling for shipments and transactions calls
- Fixed and added tests
**Behavioural Changes**
- [WARNING] Changed keyword for creating shipments and transactions synchronously from `sync=True` to `async=False`
**Minor Improvements**
- Added fixtures to our tests using vcr
- Added Travis-CI
- Added badges to the README
- Bumped unittest version