Proxy support for localshop. requests package must be upgraded to
version 1.1.0 because a bug in version 1.0.4.
Merge branch 'proxy_support' into develop
Localshop isolated mode, when enabled never never try to redirect the client to PyPI.
Merge branch 'isolated' into develop
download_file view docstring
Merge remote-tracking branch 'bbva-itadmcenter/develop' into develop

Conflicts:
	localshop/apps/packages/tasks.py
PEP8
Rework some logic behind LOCALSHOP_ISOLATED

There is no need to run the task via celery and
then sleeping in the main process. Just download
the file within the request process