update setuptools to fix pip install bug

Author: Yasser Elsayed

.travis.yml

@@ -1,12 +1,13 @@
 language: python
 python:
   - "2.7"
-  - "3.4"
 
 before_install:
+  - sudo apt-get install -y python-setuptools
   - npm install -g typescript
   - tsc --module amd --noImplicitAny --outdir datalab/notebook/static datalab/notebook/static/*.ts
   - pip install -U pip
+  - pip install -U setuptools
   - pip install .
 
 script: python ./tests/main.py

setup.py

@@ -118,8 +118,8 @@
 
 # install tensorflow
 if not tensorflow_path:
-  print """Warning: could not find tensorflow build for your OS.
-  Please go to https://www.tensorflow.org/get_started/os_setup to see install options"""
+  print("""Warning: could not find tensorflow build for your OS.
+  Please go to https://www.tensorflow.org/get_started/os_setup to see install options""")
 else:
   pip.main(['install', tensorflow_path])