Add BodyClass to the bootstrap layout

Adds a useful class to the body on the layout.
Add Navbar to bootstrap template

Adds a navbar template and a nav structure for quick operations.
Adds the navbar template to the bootstrap layout.
Add proper index handling

Handles the index situation correctly when serving.
* NoIndex paths should 403 on the empty dir
* index.(html?|php) redirect to ./
* Pattern established to 404 junk in the path beyond the handled path
Move Error Functions to new file

Move to keep things a bit more clean.
Templates Should write to a buffer

When templates write directly to a `http.ResponseWriter`, there is
a risk of an error. When there is an error, `WriteHeader()` is
accidentally called twice with conflicting status codes, and an
incomplete page is rendered. Instead, we ensure that the templates
do not error before we write to the `http.ResponseWriter`.
Add support for Markdown Processing

Adds support using the github.com/russross/blackfriday package as
functions available within the globally available templates.
Pretty Error Pages

Starts serving pretty error pages instead of ugly text ones.