5 new dependancies...

 * Lodash - all purpose utility, faster than underscore;
 * Bookshelf - a Database ORM;
 * MySQL - the database driver to power it;
 * Knex - the query builder for Bookshelf, if you need it; and
 * Bluebird - the promises library from Bookshelf, for our own use

We'll not use all of these in this base up, but extenions upon
gumbo should use these to remain on the menu ;-)

-Dx