changed: added myself to new contributor file

Everybody that feels they have contributed to xbmc feel free to fill yourself into this file with some info on what you have contributed with.

Ps. I've not really decided on how specific the file should be or it's exact formatting. So feel free to come up with something nicer.

git-svn-id: https://xbmc.svn.sourceforge.net/svnroot/xbmc/trunk@35046 568bbfeb-2a22-0410-94d2-cc84cf5bfa90

CONTRIBUTORS

@@ -1,3 +1,8 @@
+Joakim Plate:
+    filehtsp, filecurl, filevtp, filemyth,
+    overlayrenderer, filehdhomerun
+    dvdplayer, upnp, sapfile, ...
+
 Andreas Öman:
     libhts