upgraded member isequal to handle most types; fixed typo in isempty; implemented methods "ismethod" and "isprop" and refer to those in method "respondsto"; upgraded method "isnum" to handle char
upgraded member isequal to handle most types; fixed typo in isempty; implemented methods "ismethod" and "isprop" and refer to those in method "respondsto"; upgraded method "isnum" to handle char

jgte/orb,jgte/orb,jgte/orb,jgte/orb,jgte/orb