Remove .git from built package

Clean-up some of the files that get added with setup.py is run.
This is some prep work for when it makes it to PyPi.

Change-Id: I70c7d284ac0f3ec03d02a945f7162e063b023688

MANIFEST.in

@@ -1,2 +1,3 @@
 include *.txt *.ini *.cfg *.rst
+exclude .git .gitignore
 recursive-include charm *.ico *.png *.css *.gif *.jpg *.txt

setup.py

@@ -69,8 +69,9 @@ setup(
     author_email='alex.kavanagh@canonical.com',
     license='Apache-2.0: http://www.apache.org/licenses/LICENSE-2.0',
     packages=find_packages(exclude=["unit_tests"]),
+    exclude_package_data={'': ['.gitignore', '.git']},
     zip_safe=False,
-    cmdclass = {'test': Tox},
+    cmdclass={'test': Tox},
     install_requires=install_require,
     extras_require={
         'testing': tests_require,