+#### avail. methods on the federica side as of 2012/02/13
+# listAvailableResources(String credentials, String rspecVersion)
+# listSliceResources(String credentials, String rspecVersion, String sliceUrn)
+# createSlice(String credentials, String sliceUrn, String rspecVersion, String rspecString)
+# deleteSlice(String credentials, String sliceUrn)
+# listSlices()
+# getRSpecVersion()
+##### all return
+# Result: {'code': 0, 'value': RSpec} if success
+# {'code': code_id, 'output': Error message} if error
+