added ignore files
Merge branch 'master' of github.com:dotcloud/docker-registry
The secret_key is not generated automatically.

This "feature" introduced too many configuration bugs. Gunicorn now
set the pass the key automatically in the environment. If the key is not
set, the registry will not start.

Fixes #261

Docker-DCO-1.1-Signed-off-by: Sam Alba <sam.alba@gmail.com> (github: samalba)
Merge pull request #262 from dotcloud/fix-secret-key-config

Fix secret key config