Use /bin/sh instead of /bin/bash

Makes the script compatible between Ubuntu and OpenBSD.
README: Add option to download tagged version
README: Notes for people who don't want CoffeeScript
README: Add a link to my blog post.
README: No need to refresh index.html because Browsersync does that for us.
Update GIF of demo
README: Update to reflect new dependencies.
Use browser-sync instead of Python. Also remove Fish dependency.
README: Add information about contributing
Add a GIF showing how easy it is to get started
Use bold instead of h3
README: Add more documentation
Organize build files and make a build script
server.fish: Fallback to Python 2 if Python 3 is unavailable.
README: Add links to dependencies.
README: Added a note on which files to modify
Finish up README
Initial commit