Separates variables for checkboxes and radio buttons

As per the title of the release, it just moves out the variables for checkboxes and radio buttons to separate values.

Initial launch

• Removes Bourbon dependency (requires autoprefixer to run in project which includes Terrain).
• Version at release of http://terrain.io

Before major changes

This release allows for Terrain (formerly known as Trove) to remain the same in existing projects.

PLEASE NOTE

Updating Terrain in a project which has used it a a base (before 22/04/14) may break the project without migrating the codebase to the updated Terrain.

Please check the following:

• Remove CSS3 Mixins and include some sort of auto-prefixer in your project
• Update grid layouts where required