Add basic release task

tasks.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8; -*-
+"""
+Tasks for Messkit
+"""
+
+import os
+import shutil
+
+from invoke import task
+
+
+here = os.path.abspath(os.path.dirname(__file__))
+exec(open(os.path.join(here, 'messkit', '_version.py')).read())
+
+
+@task
+def release(ctx):
+    """
+    Release a new version of Messkit
+    """
+    # rebuild local tar.gz file for distribution
+    shutil.rmtree('Messkit.egg-info')
+    ctx.run('python setup.py sdist --formats=gztar')
+
+    # upload to public PyPI
+    ctx.run('twine upload dist/Messkit-{}.tar.gz'.format(__version__))