added find and replace script

tests/find-replace

@@ -0,0 +1,95 @@
+#!/usr/bin/env curly
+>main
+gto
+:find
+=i
+=term
+=text
+:loop
+$text
+$i
+$i
+$term
+len
+add
+slc
+=part
+$i
+$i
+inc
+=i
+$i
+$text
+len
+$term
+len
+sub
+>not-found
+ggt
+$part
+$term
+>loop
+gne
+ret
+:not-found
+neg
+ret
+:replace-all
+=replacement
+=quest
+=target
+\
+=result
+0
+=from
+:replace-loop
+$target
+$quest
+$from
+>find
+fun
+=pos
+$pos
+0
+>replace-done
+glt
+$result
+$target
+$from
+$pos
+slc
+$replacement
+cat
+cat
+=result
+$pos
+$quest
+len
+add
+=from
+>replace-loop
+gto
+:replace-done
+$result
+$target
+$from
+$target
+len
+slc
+cat
+ret
+:main
+\Bananen hangen in warme landen aan de bananenboom.
+\an
+\@|\|
+>replace-all
+fun
+out
+=_
+$target
+\en
+\un
+>replace-all
+fun
+out
+end