Create release 1.2.1 (#147)

diff --git a/setup.py b/setup.py
index 1893d98..05265e0 100755
--- a/setup.py
+++ b/setup.py
@@ -53,13 +53,13 @@
 def main():
     setuptools.setup(
         name='mobly',
-        version='1.2',
+        version='1.2.1',
         maintainer = 'Ang Li',
         maintainer_email = 'mobly-github@googlegroups.com',
         description='Automation framework for special end-to-end test cases',
         license='Apache2.0',
         url = 'https://github.com/google/mobly',
-        download_url = 'https://github.com/google/mobly/tarball/1.2',
+        download_url = 'https://github.com/google/mobly/tarball/1.2.1',
         packages=setuptools.find_packages(),
         include_package_data=False,
         scripts=['tools/sl4a_shell.py', 'tools/snippet_shell.py'],