Started styling simple view

Updated windows scss files to use rem units more.
Excluded site/css file (contains compiled scss files)
Moved some shared HTML into separate files in site/_includes/

Added meta tags.
Added extra config for SEO to _config.yml
Moved window view into separate file
Minor changes to committee page
Added "Under Construction" index file
Replaced watch.sh with Grunt

Watch and compile SCSS files.
Watch and compile Jekyll source dir.
Added dependency on Sass and Jekyll via Gemfile.