Fixed bug: Sean Something <knowone@zensearch.com> and Christopher
Walker <cewalker@uchicago.edu> correctly reported that lnga did not
not stack when typed. (It gave "lang". But it worked correctly in
F9 conversion.) This was a side-effect of the "sara" fixes in
2.0b2. Fixed by invoking the consonant stack buffering code when we
get "ln".
Changed both parsers to allow ' (a-chung) as root, in order to handle
"'od" which Robert Walker <robertjwalker@onetel.net.uk> correctly
reported failed in Wylie->Tibetan conversion. (It also failed in the
opposite direction.)
Fix typo in comment at beginning of Wylie parser.
97c1b4db57