Remove checked-in `bower_components`

[cdata]

• Assume dependencies are in sibling project folders
• Remove checked-in bower_components
• Ignore bower_components 780f448
• Abstract raw demo to a separate HTML file.
• Use sibling path for emojilib.
• Add emojilib dependency to Polygit url.

[cdata]

Closing this since it's a very crufty change and we discussed better alternatives.