Change of structures, design and setup of other pages within Labs

Made extensive changes to the inheritance of liquid templates. Changed
base fonts to fit current design. Added rough text for other pages.
Changed the lookup of dataset list items to come from _data folder —
this is probably a good model for other lists, reserving the posts
functionality for a blog.
Added Gemfile to work with bundler

In order to make sure that local development versions of Jekyll and
other gems were consistent with the current set in github pages.
Gemfile.lock is a current list of versions required by this site.
Created multiple categories for posts, necessitated moving files.

Added pages and posts for the Spaces as well.