Added the test reqs to setup.py.
Add support for creating payment buttons.
Merge branch 'master' of github.com:cardforcoin/coinbase_python
Fix a bug using optional kwargs to create buttons.
Merge pull request #12 from mhluongo/master

Add Payment Button Support
Updated SSL Certs
Updated readme
Bumped version
Include ca_certs.txt in distributions
Get more info from tx failures