calabash and json

  

<p:unescape-markup content-type="application/json"/>

There seem to be two problems:

1. Leading white space causes failure.
2. content type may have charset e.g. content-type="application/json;charset="UTF-8"" 

Fix for first is to use nextClean() in place of next() in com.xmlcalabash.util.JSONtoXML.java

  private static void build(TreeWriter tree, JSONTokener jt) {
        tree.addStartElement(_json);

        try {
            char ch = jt.nextClean();
            jt.back();