Add python 3 tests and configure with Travis CI

[bhaveshAn]

I'm submitting a ...

• bug report
• feature request

Current behavior:

Only Python 2 testing is present.

Expected behavior:

Add python 3 tests and configure with Travis CI

Steps to reproduce:

Others can claim

[bhaveshAn]

For Python 3 code, create PR against python3 branch

[anand-371]

i am interested in this issue
could i be assigned