Update README.md
Added explicit Authentication section
Merge pull request #34 from ramittal/master

Controller model with namespaces
temp add dummy keys
Update README.md
Update phpunit.xml.dist
Update README.md
Merge pull request #35 from brianmc/master

Testing a PR merge
Merge pull request #36 from ramittal/master

Travis integration, with environment variables used from travis
Merge pull request #37 from ramittal/master

Ignoring some tests.
Skipping some more flaky test
Skipping tests that are erroring out
Merge pull request #38 from AuthorizeNet/future

Merge future in for release 1.8.3
Update README.md
Merging from anet