Cleaned up lots of code.
Added "trial already exists" use case.
Properly setting payload messages and http.statuses for REST api.

BLOCKER: CreateStack.java can no longer parse the JSON properly. current error...

ERROR 2014-05-15 17:46:46,020 [[trial-provisioning].httpsConnector.receiver.02] org.mule.exception.CatchMessagingExceptionStrategy:
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Message               : Component that caused exception is: DefaultJavaComponent{createStackFlow.component.397457253}. Message payload is of type: JsonData
Code                  : MULE_ERROR--2
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Exception stack is:
1. Not a valid element: stackName (java.lang.IllegalArgumentException)
  org.mule.module.json.JsonData:128 (null)
2. Component that caused exception is: DefaultJavaComponent{createStackFlow.component.397457253}. Message payload is of type: JsonData (org.mule.component.ComponentException)
  org.mule.component.DefaultComponentLifecycleAdapter:348 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/component/ComponentException.html)
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Root Exception stack trace:
java.lang.IllegalArgumentException: Not a valid element: stackName
	at org.mule.module.json.JsonData.get(JsonData.java:128)
	at com.splunk.enterprisetrials.CreateStack.onCall(CreateStack.java:50)
	at org.mule.model.resolvers.CallableEntryPointResolver.invoke(CallableEntryPointResolver.java:46)
    + 3 more (set debug level logging or '-Dmule.verbose.exceptions=true' for everything)
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Merge branch 'splunk-enterprise-trials' of https://github.com/SplunkIT/mule into splunk-enterprise-trials

Conflicts:
	trial-provisioning/src/main/app/createtrial.xml
	trial-provisioning/src/main/java/com/splunk/enterprisetrials/CreateStack.java
	trial-provisioning/src/main/resources/mule.dev.properties