changed content of 404 template to accomodate file not found as well as page not found; adjusted test messages accordingly

added default route handler for 404 pages, captures prefix to avoid returning to default index poage; minor template teaks

major rewrite - combined separate docs-lib and moongate apps into single app using prefixes with multiple route files; merged DB functions into model which is now a D2 plugin, providing encapsulated model domains (infolib, moongate & dpw); uses route names to allow tt to call uri_for_route, but some caveats: * route names must be unique across all route files * uri_for_route cannot be used in any template loaded after a forward since the data required in request.uri_for_route($name) is deleted during the forwarding process leading to fatal error when tt calls the uri_for_route function; META function no longer works since tt WRAPPER function disabled to allow routes to define layout

replaced Starman with plackup, not required for low-use app; added restart always to docker-compose file; no longer supplying title to templates, using appname; added README file for relevant deployment info

initial commit - login route working