Updates to 2.9.34

- Added support for custom init and callback functions. All init and
callback function can still be declared here,
    but users can now use an outside Javascript file that they can
maintain during updates, so that they don't lose
    their changes when they update.
    To use the custom script, they only need to include it in the index
file like so:
     <script type="text/javascript" src="js/MWBConfig.js"></script>
    To call the scanner with the custom init and callback you use
scanner.startScanning(MWBSInitSpace.init,MWBSInitSpace.callback);

    - Added MWBsetCustomParam: function - allows user to put some
custom key/value pair which can be used later from native code

    - Added ITF-14 support

    - Added Code 11 support

    - Added MSI Plessey support

    - Added GS1 support