Add license file

GPL v2 is the standard license for anything WordPress related. License
text copied from http://www.gnu.org/licenses/gpl-2.0.txts
Add `.editorconfig` configuration file
EditorConfig helps developers define and maintain consistent coding
styles between different editors and IDEs. The EditorConfig project
consists of a file format for defining coding styles and a collection of
text editor plugins that enable editors to read the file format and
adhere to defined styles. EditorConfig files are easily readable and
they work nicely with version control systems.

A base configuration is set up to reflect the WordPress Coding Standards.
Scaffold out base classes for organization

Added two base classes to start attach all existing functionality to.
Currently functions are all over the place. This provides some
singleton classes and folder structure.

This structure is based on Tom McFarlin's WordPress-Plugin-Boilerplate
repository (https://github.com/tommcfarlin/WordPress-Plugin-Boilerplate)

[Addresses: #1]