Fix several issues with the old layout. For that I had to:

- Revert some positioning code.
- Child nodes are not positioned
- Don't support export/import of relations

This is a temporal fix in order to stabilize the old layout. Pablo, we need to discuss how this will be fix to fit the new layout.

wise-webapp/src/main/java/com/wisemapping/xml/freemind/Node.java

@@ -130,7 +130,7 @@ public class Node {
     // Wise Extensions
     @XmlAttribute(name = "wCOORDS")
     protected String wcoords;
-    @XmlAttribute(name = "WORDER")
+    @XmlAttribute(name = "wORDER")
     protected BigInteger worder;
 
     /**