JOSM compatability and addition of German Ne2, Ne5 and H/V distant signals

Hi rurseekatze,

I added support for German Ne2, Ne5 (West) and the H/V distant signals. I also added a lot of quotation marks for JOSM support. 

I overwrote your icons for Ne2, and H/V distant signals because my icons are nicer. :) I also added German Zs10.