Pytest-vts

Changed
- don't record set-cookie in case cookies library fails to parse
it. This is to mitigate responses usage of cookies.

Added
- support for chunked http transactions

Added
- allow requests to be recorded in multi-(g)threaded environments.

Fixed:
- no change, expect pypi's fixed description for CHANGELOG link

Added:

- add support for python3

- *playback* mode: improved comparison of HTTP requests agains the
recorded ones. By default a warning is being [logged][logging] or
if "strict_body" is enabled the body is being
[asserted][pytest assert]

- *recording* mode: beside switching to this mode when a cassette
file is missing, now it's possile to force this mode by using
`PYTEST_VTS_FORCE_RECORDING` environment variable

Removed:

- remove almost all usages of external sites for unittests

Removed:

- disable the matching of requests' bodies to the recorded requests
bodies.