Adding version module to improve version handling

This change adds a top-level version module to hold the version
definition for the library. This is then used in both kmip/__init__.py
and setup.py, allowing version inspection on import of the library and
automatic syncing of the version across the project.

kmip/version.py

@@ -0,0 +1,16 @@
+# Copyright (c) 2015 The Johns Hopkins University/Applied Physics Laboratory
+# All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+__version__ = '0.3.2'