create instrumentations, handle errors better, get an individual instrumentation

lib/fog/joyent/analytics.rb

@@ -18,6 +18,8 @@ module Fog
 
       request :describe_analytics
       request :list_instrumentations
+      request :get_instrumentation
+      request :create_instrumentation
 
 
       model_path 'fog/joyent/models/analytics'
@@ -132,6 +134,9 @@ module Fog
 
           response
         rescue Excon::Errors::HTTPStatusError => e
+          if e.response.headers["Content-Type"] == "application/json"
+            e.response.body = json_decode(e.response.body)
+          end
           raise_if_error!(e.request, e.response)
         end
 

lib/fog/joyent/compute.rb

@@ -173,6 +173,9 @@ module Fog
 
           response
         rescue Excon::Errors::HTTPStatusError => e
+          if e.response.headers["Content-Type"] == "application/json"
+            e.response.body = json_decode(e.response.body)
+          end
           raise_if_error!(e.request, e.response)
         end
 

lib/fog/joyent/models/analytics/instrumentations.rb

@@ -12,6 +12,11 @@ module Fog
           load(data)
         end
 
+        def get(id)
+          data = service.get_instrumentation(id).body
+          new(data)
+        end
+
       end
     end
   end