Added ability to add bars from other modules

I have added the ability to call  breach.module('mod_strip').call('add_bar', {
                        url: 'http://localhost:' + port + '/bar',
                        dimension: 45,
                        id: 'bookmarks'
                    }, cb_);

Which increases the height of the mod_strip strip bar and inserts an iframe with the new module underneath it.  This can be done multiple times to add multiple other bars underneath the strip bar.