Added all authors

Author: rhempel

setup.py

@@ -4,7 +4,7 @@
     name='python-ev3dev',
     version='0.0.1',
     description='Python language bindings for ev3dev',
-    author='Ralph Hempel',
+    author='Ralph Hempel/Denis Demidov/Anton Vanhoucke',
     license='MIT',
     url='https://github.com/rhempel/ev3dev-lang-python',
     include_package_data=True,