added data json file to control some strings and basic settings for the assemble hbs templates to make use of, see #2
added a demo dir in src, should be used for demo specifics pages, such as they are see #2
added some more variables to partials and default.hbs, see #2
big changes to Gruntfile, registered some new tasks, (yet to be fleshed out), and refactored options for default and diff builds for the assemble task. much more logical, see #2