social-poster.py: work around https://github.com/jgoerzen/twidge/issues/58 by converting tweet message to ascii before posting, add TODO
add fix for https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=748691, vboxautostart-service inti script
utility: add tiddlywiki empty template and docs from http://tiddlywiki.com
utility: rename todo to todotxt, add todotxt.desktop launcher