Added support of deployment to other AWS zone
Fixed typo
Removed Guardfile and commented debug commands
Merge branch 'pr/323' into develop

  * Migrations updated, passing nil instead of mock'd Bosh::Aws::AwsProvider
  * Drop Gemfile.lock changes

Conflicts:
	bosh_cli_plugin_aws/spec/unit/elb_spec.rb
[cli] Custom private key for gateway user on ssh gateway

Usage:

    bosh ssh core/0 --gateway_host 54.225.99.105 --gateway_identity_file ~/.microbosh/ssh/firstbosh --gateway_user vcap
Fix quoting and remove duplicate line from merge
Revert "Merge branch 'pr/323' into develop"

This reverts commit 2209f916ff825acd681a0e79ac39725bd33c7560, reversing
changes made to e835ee31d192a084e6a173176345f5af02ab148b.