setup.py: update the setup file to support py2.7

Updated setup file and travis

Author: sarathsp06

.travis.yml

@@ -9,6 +9,7 @@ python:
 install:
   - pip install mock==2.0
   - pip install requests
+  - pip install .
 script:
   - python -m unittest discover -s tests/ -p test_*.py -v
 matrix:

setup.py

@@ -1,5 +1,6 @@
 from os import path
 from setuptools import setup
+from io import open
 
 def get_description():
     working_directory = path.abspath(path.dirname(__file__))