Merge pull request #18 from FearsomeFoursome/ARbranch

updates
Merge pull request #21 from FearsomeFoursome/ARbranch

moved servlet, updated XML
updated the QueryByCatID and QueryCategories servlets: adjusted where the sql connection statements are, changes sessions to requests, stored the results of the method calls to the new object;
adjusted the exception error from .out.println to .err.println in both category servlets;
added updater servlet - everything seems to be working