Use PSR-4 loading instead of classmap
Merge pull request #24 from yguedidi/composer-psr-4

Use PSR-4 loading instead of classmap
Fixed bug that blindly appended params to a url
Merge pull request #40 from SammyK/hotfix-graceful-url-appending

[Bug Fix] Fixed bug that blindly appended params to a url
Quick change for DELETE, PUT methods
Added more specific handling for exceptions thrown by Graph