Add basic stylesheet with colored elements and floating asides.
Add stylesheet link to base.html
Add blank application.js to static folder for potential future use
Add title to base.html, made output box's output conditional on reply; adjusted HTML class names to be lower case on base.html and stylesheet.css
Revise base.html to make the title a header; add id for main content
Revise style.css to use flexboxes inspired by https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Flexible_boxes
Revise base.html containers to match the flexbox example for easier integration of the flexbox inspired stylesheet