XML interlis format for identify

 Issue #108 

First version of interlis based service.

I'll merge this one fast because I need a feedback.

Test link:
http://mf-chsdi0t.bgdi.admin.ch/rest/services/api/MapServer/identify?geometry=682414.31244,257059.99999999997&geometryType=esriGeometryPoint&imageDisplay=1920,576,96&layers=all:ch.bazl.projektierungszonen-flughafenanlagen.oereb&mapExtent=671164.31244,253770,690364.31244,259530&tolerance=5&geometryFormat=interlis