Initial commit
Add composer.json
Add initial Client file with API key and Guzzle client
Add vendor/ dir to .gitignore
Add composer.lock
Fix order of client init and setting API key header
Add REPL wrapper to for working with a instance of the client
Use command line argument for api key
Allow host option for REPL
Tidy up REPL
Add version to composer file
Correct Guzzle headers reference
Add request methods to client
Add client docs
Add subscriber resource
Add transaction resource
Add event resource
Correct type hinting of client object in resources
Update PHP requirement to 5.4
Add bin directive to composer.json