added jquerymobile + an experimental listing for the ehrenamtsnetz-app.

based on jquerymobile 1.3.0 there is now an experimental list-view as a
possible xtension for the ehrenamtsnetz-app.

the list view in its first version aggregates data from 2 citymaps
in an easy to browse and filter listing, while just linking to further details.

live-demo: http://m.kiezatlas.de/ehrenamt/list/