Added PermissionsEx support to WEPIF.

src/main/java/com/sk89q/bukkit/migration/PermissionsResolverManager.java

@@ -68,6 +68,7 @@ public class PermissionsResolverManager implements PermissionsResolver {
     public void findResolver() {
         if (tryPluginPermissionsResolver()) return;
         if (tryNijiPermissions()) return;
+        if (tryPermissionsEx()) return;
         if (tryDinnerPerms()) return;
         if (tryFlatFilePermissions()) return;
         
@@ -85,6 +86,16 @@ public class PermissionsResolverManager implements PermissionsResolver {
         }
     }
     
+    private boolean tryPermissionsEx() {
+        try {
+            perms = new PermissionsExResolver(server);
+            logger.info(name + ": PermissionsEx detected! Using PermissionsEx for permissions.");
+            return true;
+        } catch (Throwable e) {
+            return false;
+        }
+    }
+    
     private boolean tryFlatFilePermissions() {
         if (FlatFilePermissionsResolver.filesExists()) {
             perms = new FlatFilePermissionsResolver();
@@ -184,5 +195,9 @@ public class PermissionsResolverManager implements PermissionsResolver {
         }
         return isUpdated;
     }
+    
+    public static class MissingPluginException extends Exception {
+        private static final long serialVersionUID = 7044832912491608706L;
+    }
 
 }