Added Dust Partials (Includes)

Will automatically include, name, and compile dust files. Naming is dynamic and includes part of the directory structure since there might be multiple "html.dust" files in different template directories. Compiled templates should also be saved in the dust cache if used by the same name.
Can you break this up a bit so that it fits within an 80 char column and include a comment? All of the path manipulation can be a little hard to read.