Feature detection
addcat
                    
                name
                    
                o
                    
                Add a test to the system
  Y.Features.add("load", "1", {});
    allcat
                    
                args
                    
                Execute all tests of a given category and return the serialized results
  caps=1:1;2:1;3:0
    A semi-colon separated string of tests and their success/failure: 1:1;2:1;3:0