add desriptive headings in source code comments
use 'error' in simple-program-error macroexpansion
define RESOURCE and related subclasses; minimize methods in FIND-COMPONENT; use ~S in format control strings
reorder component/context arguments
revisisions in FIND-COMPONENT; rename properties container=>location
rename path=>location
use with-gensym in cnm*; update sysdef for component additions
add file
rename path=>location
export new symbols
add intern*, intern-formatted
update test form
update condition name
add alternate defsys example; move resource component class hiearchy info defsys-ex.lisp
add class-designator type, compute-class function