Add CopyFromContainer example
Godeps: declare file
travis: use godep to run tests
travis: build against go 1.1.2 and go 1.2

Also test 386 and amd64.
travis: call godep restore before running tests
travis: also build against tip
Merge branch 'master' into fix_tests_for_0.7
Update dependencies

I've ran:

* godep restore
* go get -u github.com/dotcloud/docker
* dodep save