Merge pull request #7 from flipstewart/easily-configurable-overlays

Let overlay colors be declared in HTML only
Update README.md

Added Flip Stewart.
Complete refactor with model-view separation. Fixes several UI bugs.
Adding readme explanation for canvas security sandboxes.
Adding page title.
Adding SBN community logos.
Adding resized images.
Adding customizable editor theme color.
Merge branch 'meme-v2' into sbn-communities
Tailoring theme to sbn communities.
Fixing watermark link.
Adding SBNation branding.
Adding Chorus configuration.
Adding Chorus integration gems.
Revised gemfile
Adding watermark switching control.
Resized MMA Fighting watermark.
Adding watermarks as static assets.
Adding "crossOrigin" attribute to image loaders.
Adding watermarks as base64 data.