adding an ehrenamts-App distro, with minor usability improvements.

based on the ka-0.4.2.js the ehrenamtsnetz-app will become a spin off of ka.js.
(the ehrenamtsnetz-app is not going to be moved to be based on php, that's why)

in this commit, the following functional changes were introduced:
- asynchronous loading of detailed information
  making the progress-bar visible before the response arrives
- rendering just the essence of needed infos in the detailed info-area
  placing the "got to action link" in the center of users attention

these changes are pending for the current ka-SNAPSHOT.js