Remove a spurious character in the WebTiles config
Improve the error and message handling of the WebTiles title script

The webserver/get_titles.py script now prints warnings and continues
if the server pid file isn't in the config or can't be opened, and
only sends SIGUSR2 if it has found a server pid. It also prints
activity messages by default, which can be suppressed by a '-q' option
so only warning/errors are printed.