* have break macro
 * while/break macros with nicer throw tag
 * took out broken with-gensyms (dunno why, tho)
 * function aliases section (moved fset in front of it)
 * number comparison macros
 * length now handles trings and lists
 * a string-length builtin for the latter
 * significantly faster filter function
 * an apropos with some information about the symbols
 * and apropos-list as it data source
 * have the error builtin use a format string
 * a general function p2l() to convert Python objects instead of
   several specialized ones
 * the describe methods now already return Objects
 * the Error representation now includes the attributes