GUI-337: Display checkbox when condition key expects a boolean or if condition operator is Null
GUI-337: Add availability zone selector to conditions, switching to plain input field when "Like" operators are selected.
GUI-337: Add image type picker for conditions, setting appropriate choices based on Euca or AWS
GUI-337: Display text input when the condition operator starts with "Arn"
GUI-337: Add instance type choices to conditions
GUI-337: Add snapshot choices widget to conditions
GUI-337: Add volume choices for ec2:ParentVolume condition key, applicable to ec2:RunInstances action
GUI-337: Add choices for ec2:RootDeviceType condition key
GUI-337: Avoid displaying context-specific widgets unless a condition key and operator are selected.
GUI-337: Add input for numeric condition values (e.g. VolumeSize).
GUI-337: Add options for ec2:Tenancy condition key in a policy statement
GUI-337: Add choices for ec2:VolumeType condition in a policy statement
Merge pull request #294 from eucalyptus/GUI-337

GUI-337: IAM Policy Generator - Context-specific widgets based on condition keys and operators