Add skeletal client and api.AddKnownTypes method
Merge pull request #46 from pmorie/abstract

Merged by openshift-bot
Add images & image repositories

Add initial support for images & image repositories.

Add registry webhook to support adding images and tags
to image repositories when a registry's image repository
is updated.
Method signature consistency

Make signatures for listing image repositories match those for listing
images (return ImageRepositoryList instead of []ImageRepository)
Remove ImageRepository.Name
Various fixes

Remove MemoryRegistry.
Add EtcdRegistry.
Various renames.
Add back type registration with Kube api

For some reason http requests are failing to encode/decode when the
image types are only registered with osapi, so add back the Kube api
registration for now.
Add initial image repository watch support
Various fixes

Shorten variable names.
Add more error checking and tests.
Restructuring

Moved mock registries to new imagetest package.
Added some more tests.
Remove test json files