Log all requests/responses made through guzzle
Merge
Guzzle version required is 3.9 for log plugin to work. Updated travis.yml
Mock logger interface to test omnipay service
omnipay/common is required for the bundle. omnipay/omnipay is required for test.
Add Psr/log as dependency. Clean up travis configuration
Merge pull request #2 from kotrakrishna/master

Log all requests/response made through guzzle