Includes a heist reloader that reloads only templates without reloading the rest of the site.
The previous implementation did not work for compiled splices and my attempts at generalizing it to work with both interpreted and compiled splices all failed. In some ways this is better anyway because it means we're always working in HeistT and don't have to deal with the pain of not having a MonadHeist type class.
http://stackoverflow.com/questions/8297831/adding-onload-hooks-for-heist-templates-using-the-snap-web-framework that prevents the use of Heist's onLoad hooks when using the Heist snaplet.
…rk on docs and tests.