Add support for multiple deploy commands as well as nested choice options
Merge branch 'master' into make-deploy-cmd-list

Conflicts:
	lib/soyuz/command.rb
Add Environment building to the config validation check, only allow either deploy_cmd or deploy_cmds not both, update readme for deploy_cmd deprication
Swap empty command logic to be easier to grok
Merge pull request #12 from sportngin/make-deploy-cmd-list

Add support for multiple deploy commands as well as nested choice options