fixing search for bPermissions

Closes #182

src/main/java/com/sk89q/wepif/bPermissionsResolver.java

@@ -32,7 +32,7 @@ public class bPermissionsResolver implements PermissionsResolver {
 
     public static PermissionsResolver factory(Server server, YAMLProcessor config) {
         try {
-            Class.forName("de.bananaco.bpermissions.ApiLayer");
+            Class.forName("de.bananaco.bpermissions.api.ApiLayer");
         } catch (ClassNotFoundException e) {
             return null;
         }