Apiritif

- correcting release

- add utility functions: `encode_url()`, `base64_encode()`, `base64_decode()` and `uuid()`
- fix sample handling (statuses, error messages, assertions) for nested transactions
- add `assertions` field to samples
- fix `responseMessage` JTL field writing in load testing mode

- add utility functions: `format_date()`, `random_uniform()`, `random_gauss()` and `random_string()`
- add loadgen utility

- allow attaching data and status to `transaction` from code

- fix package requirement
- refactor HTTPResponse class to contain data fields

- extract as standalone project from Taurus


Roadmap / Ideas

- have field in response for parsed JSON
- handle file upload requests - give sugar
- complete endpoint concept with path component
- support arbitrary python code pieces