Check dropbox daemon status and report it in few chars

For QOTD, 512 is not mandatory, so allow to fetch more data
if user asks (by using "-c" argument).

To prevent duplication of error catching

Imply str() on msg so that anything can be passed

As moc-titler ported to Python/gmon

  [1]: https://github.com/AloisMahdal/moc-titler