Added ExitWP export of WordPress Site & updated site files

Ran the ExitWP WordPress export script on my wxr file and copied the generated files into the _posts &
_pages folders
Using the Rakefile from richardp2.github.io as a template, updated the Rakefile with the tasks I'm
used to from my previous Jekyll migration
Added the Gruntfile and necessary Node.js modules
Added/updated the plugins to match those from richardp2.github.io
Updated layouts, includes etc from richardp2.github.io
Added "where we've been" map to sidebar