Include gitdeploy middleware by default
Use user.email from git config
Add a heroku config middleware to at least tell if we are deploying to heroku
Merge branch 'master' of github.com:remind101/git-deploy into builtin-middleware

Conflicts:
	lib/git-deploy/git_config.rb
Remove sanity middleware from gitdeploy example
Merge branch 'master' into builtin-middleware

Conflicts:
	lib/git-deploy/git_config.rb
	spec/git-deploy/hipchat_spec.rb
Merge pull request #13 from jeremyruppel/builtin-middleware

Builtin middleware