Enhanced arguments handling

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)
Pin hacking to fix tests

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)
Enhanced arguments handling

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)
Bump core version

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)
Enhance filtering on the driver interface

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)
Better (index-based) validation

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)
Fix parameter naming

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)
Revert hacking temporary pinning from 0.8

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)
Merge pull request #539 from docker/0.8-backport

0.8 backport
Dont rewrite content identical to cached data
Remove private image endpoints

The private image endpoints were broken, unused,
and undocumented.

Signed-off-by: Eric Windisch <eric@windisch.us>
Merge pull request #546 from ewindisch/remove_private_endpoints

Remove private image endpoints
fix parenthesis for default environment variables
refs #484 to configure CORS
Merge pull request #549 from visualphoenix/bugfix/env_defaults

fix parenthesis for default environment variables
Merge pull request #544 from docker/lru_oprimize_put_content

Dont rewrite content identical to cached data
Merge pull request #484 from S1E11/master

to enable CORS tag API
Better config exception handling

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)
Fix regression on gunicorn start

For some reason, specifying reload broke launch

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)
Slight grammar thing

Docker-DCO-1.1-Signed-off-by: Olivier Gambier <olivier@docker.com> (github: dmp42)