Building docker images without shelling out!
Catching an error when path to Dockerfile is not sanitary
Using the correct ContextDir for builds

...by passing the `BuildCmd` the `builder.Workdir` as the `ContextDir`,
replacing the default of `.`
Use full path to gox in Makefile
Remove unused function
Merge branch 'fix-server-failure-if-no-basic-auth-provided' into docker-build-without-shelling-out
Merge branch 'fix-server-failure-if-no-basic-auth-provided' into docker-build-without-shelling-out
Merge branch 'fix-server-failure-if-no-basic-auth-provided' into docker-build-without-shelling-out
Add support for new x-registry-config header
Fixing tests given the change to build with the go-dockerclient
Merge pull request #133 from rafecolton/docker-build-without-shelling-out

Building docker images without shelling out!
Bump version in README in anticipation of release
Adding support for TLS DOCKER_HOST

Workarounds courtesy of
https://github.com/fsouza/go-dockerclient/issues/173. They can likely be
removed after better support for TLS docker connections is added to
go-dockerclient.
No longer installing docker client in container

it is no longer needed since we are no longer "shelling out" (using
`os/exec`) to invoke docker commands
Finally switching to deppy

took ya long enough, geeze
Only verify TLS via CA if DOCKER_TLS_VERIFY is set
Using full path to deppy in Makefile
Using master for go-dockerclient
Merge pull request #145 from rafecolton/minor-updates

Minor updates
[TRIVIAL] Update to README to trigger GitHub webhook for testing