HTML pages now have titles
Added UI guide, style changes.

Restored the layout classes (should be treated as placeholders for more aesthetic deisngs later) for images and tables. Improved wording, fixed spelling errors. Haven't done any formatting for the individual part sections. My preferred way would be to box them in a <div>, but that could cause more trouble than it's worth in Markdown.

Haven't touched flight computer yet -- want to first make sure I understand it completely.