Load posts data into page using Mustache template

This commit fixes some bugs with the model generation and mustache
template, and then loads the template and the data and puts them on the
page once the document is ready.

It also removes the dummy data from the main 'index.html' file.

Because of the use of '$.get' to load the external Mustache template, we
now need to use 'python -m SimpleHTTPServer' to serve the page when
developing.