Added support for MCO named parameters.

Created by: stefanoborini

Introduces the MCO Parameter classes with support for naming

force_bdss/mco/parameters/tests/test_parameter_factory_registry.py

+import unittest
+
+from force_bdss.mco.parameters.parameter_factory_registry import \
+    ParameterFactoryRegistry
+
+
+class TestParameterFactoryRegistry(unittest.TestCase):
+    def test_registry_init(self):
+        reg = ParameterFactoryRegistry()
+        self.assertEqual(reg.factories, {})