New Swift Release: r4901

r4901 is the production version of candidate release 4894.

It includes six new features:
<li>A big change to the Milestone Tracking module. Individual samples can now be assigned to different people for approval (instead of being the coordinator’s responsibility)</li>
<li>Customer order numbers are validated to prevent duplications </li>
<li>The document contact sheet now has Skype, Whatsapp and WeChat contacts added </li>
<li>Barcode numbers for SKUs can either be drawn from a list of imported UPC codes, or generated automatically (automatic ones are for internal use)</li>
<li>A new report has been added: WAREHOUSE DELIVERY REPORT </li>
<li>Current stock levels have been added tot he CATALOG report</li>