Move vendor folder to src/vendor

Signed-off-by: Ryan Holder <ryan@ryanholder.com>
Move all source files into src/
grunt build -> compiles and copies src/ to dist/
grunt dev-Server -> serves content from dist/ on localhost:4567/ with live-reload
Relocate manifest.json to src/
Point http-server at dist/
Remove unused files
Strip down Gruntfile.js to just contain clean and build tasks