Merge pull request #16 from FearsomeFoursome/master

branch
created Category & CategoryList java classes to handle the catalog search objects;
testing the icon files; no changes to code
created a QueryCategories Servlet;
created a session object within the servlet;
***JSP has not yet been updated to test the servlet- completing this task next****
removed the TableException- altered to be a system.out.println;
fixes for some errors, no major changes
merge SY branch into AR, cleaned up conflict