Fetch/Curl usage

Enough of the Interfaces are implemented now to use Fetch/Curl classes that require the PSR-7 interfaces. There are still many functions to implement, which is why this release is considered a patch, rather than minor version, even though there is a lot of new functionality introduced.

Test bed

Build process set up

• PHPUnit
• CircleCI 2.0
• Scrutinizer

Bare bones

This first pre-release marks just enough functionality to implement the rest of the WebEngine.