Tempo-api-python-client

Bugfixes:
- using param projectKey in get_worklogs raises Exception [15](https://github.com/stanislavulrych/tempo-api-python-client/issues/15)

Bugfixes:
- Fixed create & update plans

Features:
- Added version 4 of Tempo API and added Tempo planner functions

Compability Notes:
- client.Tempo renamed to client_v3.Tempo

- [Added POST function and functions to create Holiday schemes and Holidays](https://github.com/stanislavulrych/tempo-api-python-client/commit/584d5eab75c39e19a4d753011accb3a6eb734a6e)
- [Added year parameter to get_holiday_schemes](https://github.com/stanislavulrych/tempo-api-python-client/commit/62418b72b10c625c7fcc9b9d1ea61f09a3c6a09d)

- feat(restclient): improved error handling in request