Began styling the web app

Made basic changes to styles.less, still experimental
Added a new theme to the public/css/themes folder to work from
Added some front-end javascript, experimental
Modifications to some jade files in 'views'

Made some changes to the front end on the signup, home, layout and
footer jade files
No meaningful change
Made a backup to the main .less file styles.less

Added styles-backup.less in case I mess the original…