First crack at porting Moth template to libguides

Switching header and footer markup to Moth template;
Adding libchat and mobile toggle to head js
Merge pull request #1 from matt-bernhardt/moth

First crack at porting Moth template to libguides
Create README.md
Importing theme styles

Adding CSS styles directly to custom-head.html - I'm unclear of the
benefit of keeping them elsewhere, avoiding source control, if we're
going to store a separate set of rules rather than the native WP rules.
Let's keep everything together or merge everything entirely.
Font and spacing adjustments

Forcing "Open Sans Light", which wasn't being chosen before somehow
Reducing space around footer elements to compensate for narrower content
column
Merge pull request #2 from matt-bernhardt/moth

Moth template
Merge pull request #1 from MITLibraries/master

Applying Moth template