docs/docker: starting to improve the documentation

Making it more copy and paste friendly and fixing the broken parts
related to Docker and Tsuru. Still need some improvements regarding the
Tsuru configuration file.

Related to #747.
all: fix commandmocker import path
Godeps: update file
provision/docker: update docker-cluster import path
Godeps: update file
cmd/tsr: bump to 0.3.10
docs/releases: release notes for tsr 0.3.10
provision/docker: gofmt -s -w
docs/releases: improve release notes for tsr 0.3.10
Makefile: update godep url