This is the beginnings of an implementation of Textile in Arc. The main textile routine is empty; txt-block doesn't work because re-split, despite being in re.arc, doesn't seem to work (at least for me), so the two main working things are txt-html-block, which needs a couple variables to be defined in order to work, and txt-span and friends, which perform the standard span-like substitutions, without attributes as yet. There are probably gotchas in both routines.
