Squad-client

This 0.18 release makes TuxBuild submissions send
build metadata along with build results.

Complete list of changes going in:
* submit_tuxbuild: submit build metadata

This 0.17 release changes the base docker image to Alpine, thus
cutting the image size in half.

Complete list of changes going in:

* Dockerfile: refactor and switch to Alpine based image

This 0.16 release moves request cache activation to
inside SquadApi.configure() so other libs using squad-client
can toggle it on/off.

Complete list of changes going in:

* core: api: configure cache in SquadApi.configure()

This 0.15 release replaces the `version` command by a flag, which
is simpler. The release also improved logging.

Complete list of changes going in:

* commands: add version command
* core:
* api: check for squad server version
* api: remove nested endpoints
* models: cache build tests depending on filters
* logging: centralize all logging config
* manage: remove version command, make it a flag
* misc: use module name for the logger name
* tests: fix tests that need output from manage.py

This 0.14 release makes sure to save project settings.

SQUAD stopped displaying "project_settings" column because
it contained sensitive information. We removed this attribute
in project class and prevented that saving it as consequence.

This 0.13 release allows comparison on builds that are unfinished