Better Token Management

This RC addresses a few issues brought up by @AKoetsier.

• All tokens have a set expiration of 600 seconds (10 minutes)
• All image layer tokens are expired after use when /access endpoint is called.
• Primary tokens are set to expire 60 seconds after the last PUT/GET is received for the push and/or pull.
• Improved logging

Better Documentation and Fig Support

• Updated documentation
• Updated .dockerignore
• Added fig.yml
• Fixed a problem with the ping command not returning false for standalone header

Now with Webhooks

Fixed several bugs and implemented webhook support for all repositories.

1.3.0-rc1

• Supports docker registry 0.8.x and 0.7.x
• Private index mode -- allow users to register using the docker client by simply doing a docker login. The user's will be created with ZERO permissions and the account will be disabled. You will have to use the docker_index_cli tool (which is getting overhauled) to unblock the account and assign permissions.

v1.2.3

• Supports 0.7.x NOT 0.8.x
• Fully functioning, but project still in its infancy.