Use Guzzle or jabranr/php-curl for requests

[jabranr]

Replace internal cURL calls using jabranr/php-curl package. This has to be done with caution as this will introduce a dependency which may not be ideal. On positive side it is great to have this as package has it's own internal unit tests.

[jabranr]

Ref: #5

[jabranr]

@jamieburchell what would you say about above?

[jamieburchell]

I would question if it's necessary to build your own cURL wrapper? There are already libraries such as Guzzle that can be used to facilitate sending HTTP messages without relying on cURL even being available.

http://docs.guzzlephp.org/en/latest/

[jabranr]

No doubt. I already had one – jabranr/php-curl – as one of my other side projects so I thought I will keep it in the family 😄 but using Guzzle instead makes more sense!