Fixed UpdateCatalogue.py. Completed KaiPurchase.py, and integrated it into Catalogue.html
 - Added <!--C input grab-->, <!--Update grab-->, <!--Update grab end-->, <!--Message grab--
>, <!--C greet grab--> in Catalogue.html;
 - Fixed UpdateCatalogue.py to also copy over grab points;
 - Updated style1.css;
 - Changed style of Login.html, Registration.html, Catalogue.html, index.html.