List of PRs to merge for Python 3.x compatibility #658

Merger should do them in this order:

• 1. Unify print() usage ... Unify print() usage (#684) #684
• 2. fixes imports to be compatible with Python 2.7 and 3.3+ ... fixes imports to be compatible with Python 2.7 and 3.3+ #653 - Closed without merge
• 3. Fix remaining print ... Fix remaining print #654 - Closed without merge
• 4. Adds Travis configuration for Python 3.4 and 3.5 ... Adds Travis configuration for Python 3.4 and 3.5. #657 - Closed without merge
• 5. Fix running unit tests py3 ... Fix running unit tests py3 #656 - Closed without merge
• 6. Modified how Travis CI is used in the project Modified how Travis CI is used with the project. #716 (merged)
• 7. Clean up run_unit_tests.py ... Clean up run_unit_tests.py. #662 (merged), Makes unit tests runner more compatible between operating systems #693 - Closed without merge
• 8. Fix running unit tests py3 ... Fix unit tests on Python3 and keep them OK on Python2.7 #720 and also Fixes types for both python 2.7 and 3.x. #747
• 9. Fixes installer for both Python 2.7 and 3.x. Fixes installer for both Python 2.7 and 3.x. #718 (merged)