Prototyping index page

Reworked project structure. Updated README to indicate this.
Created a sample index page.

TODO: Manually copied across the Foundation SCSS files. This will be done via script.
TODO: Need to fix excludes so that the contents of the _site folder does not contain any scss files.
Signed-off-by: Ippoippo <ippoippo_software@ippoippo.net>