Hard code version in setup.py (fixes #23)

The previous method for setting the version would cause PyPi installs to
fail.

setup.py

@@ -9,10 +9,8 @@
     from subprocess import getoutput
 
 
-version = getoutput('git describe --always') or '1.0'
-
 setup(name='unifi',
-      version=version,
+      version='1.2.5',
       description='API towards Ubiquity Networks UniFi controller',
       author='Jakob Borg',
       author_email='jakob@nym.se',