fix(controller): read command from procfile
feat(client): upload local Procfile on builds:create

also supply -p to builds:create so users can supply a Procfile using
the CLI
fix(docs): remove duplicate PYYaml entries
test(builds): add test for deis pull -p
fix(tests): call defer after handling error
style(tests): typo
docs(using_deis): Process Types and the Procfile

This document explains to users how they can use a Procfile to
specify process types for an application.
docs(client): remove mention of PYYaml
docs(using_deis): rephrase docker image deploys
Merge pull request #2605 from bacongobbler/fix-get-command

feat(controller): send procfile entries to scheduler