Added a top level "OrchestrationEnvironment" parameter to the eval bindings reflecting
whether we are in "heat" or "cloudformation".
Passed on OrchestrationEnvironment to the cfndsl eval block
Merge branch 'master' into orchestration_environment

Conflicts:
	lib/thunder/version.rb
Merge pull request #7 from infochimps-platform/orchestration_environment

Orchestration environment