agenda update, focus on code analysis for now
ba-nth: safe element access into string or byte array
refactored ba-nth to use known words
doc in-range
ws fix
more shufflers/combinators

really should inline them some time
fixed byte array nth

was keeping some rogue condition on second position of stack
copied over iteration code from factor, implemented ba-find

used as find on strings
renamed find -> search

find is generic for sequence searching, akin to CL it seems
fix ruby reader to cope with multiline definitions