missing LnFs mapper

gui/src/main/groovy/com/muwire/gui/LNFs.groovy

@@ -0,0 +1,47 @@
+package com.muwire.gui
+
+/**
+ * looks and feels
+ */
+class LNFs {
+    static final Map<String, String> nameToClass = new HashMap<>()
+    static final Map<String, String> classToName = new HashMap<>()
+    
+    static final String[] availableLNFs
+    
+    private static register(String name, String clazz) {
+        nameToClass.put(name, clazz)
+        classToName.put(clazz, name)
+    }
+    
+    private static String camel(String s) {
+        s.substring(0,1).toUpperCase() + s.substring(1)
+    }
+    
+    private static String deriveJTattooClass(String shortName) {
+        String lnfClass = camel(shortName)
+        "com.jtattoo.plaf.${shortName}.${lnfClass}LookAndFeel"
+    }
+    
+    static {
+        register("System", "system")
+        register("Metal","metal")
+        register("Darcula","com.bulenkov.darcula.DarculaLaf")
+        ["acryl",
+                "aero",
+                "aluminum",
+                "bernstein",
+                "fast",
+                "graphite",
+                "hifi",
+                "luna",
+                "mcwin",
+                "mint",
+                "noire",
+                "smart",
+                "texture"].each {register(camel(it), deriveJTattooClass(it))}
+        availableLNFs = nameToClass.keySet().toArray(new String[0])
+    }
+    
+    
+}