Switch to side-by-side view

--- a/platform-extensions/org.ossmeter.repository.model.cc.nntp/build.properties
+++ b/platform-extensions/org.ossmeter.repository.model.cc.nntp/build.properties
@@ -1,3 +1,4 @@
 source.. = src/
 bin.includes = META-INF/,\
-               .
+               .,\
+               plugin.xml