* Remote API: Small fix in /start if empty host config

- Tests: Fix unit tests when there is more than one tag within the test image

+ Builder: Add Entrypoint to builder and container config

* Documentation: Update Docker Remote API client list to include Java library

By setting an entrypoint in the Dockerfile this
allows one to run an image and only pass arguments.

fix status code in doc

api,server: slice are already refs, no need to return ptr

Bump version to 0.4.7

* Hack: change builder tests to always use the current unit test image, instead of hardcoding 'docker-ut'

* Hack: move unit tests to a different source image, to work around issues when docker-ut has more than 1 tag.

Fix a couple critical bugs on the test suite

Allow to push/pull on independent registries (by repository or image ID)

testing|stabilization, issue 973: Use docker-golang PPA and lts-raring kernel

following the 'go vet' suggestions for the docker package.

Bugfixes on documentation code

And not a *random* one from its history.

The test runtime object wasn't properly initialized.

- Runtime: fix panic with unix socket

remove + from minor kernel version for kernels built from git