Installed RABL gem
added oj gem
Rabl configuration
Updated provider_partial and partial_exists? helper methods, added provider_rabl_view helper method
rabl provider application views
Removed unnecessary attributes, as_json methods from provider_application models
Added uptime to OpenStack provider application
Added uptime and humanized_memory to ovirt provider application
Removed attributes method and serializers dependency from launchable models
Updated tests and removed attributes method testing
Commented out cluster attribute in OvirtLaunchable which caused 'stack level too deep' issue
Merge pull request #237 from jtomasek/json_views

Json views