* filter out edited messages, just let their edits replace them
* keep deleted threads/messages, but don't show the contents
* manage edge cases from past iris bugs
* add optional logging and deactivate it in with-iris-news
- iris-colorize is a go executable which resolves {r iris colors} to
ANSI escape sequences
- with-iris-news is a shell script which starts up an iris-news server,
executes "$@" with environment vars providing its location, and shuts
down the server once the foreground application closes
- iris-tin run /usr/bin/tin under with-iris-news
- iris-slrn runs /usr/bin/slrn under with-iris-news
TJP