Drop FSMonitor, depend on watchdog

[wimleers]

See gorakhargosh/watchdog#55.

There, I wrote this:

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Hi,

I just wanted to ping you since I'm the founder/developer of File Conveyor (code on github), for which I developed something similar to watchdog, called FSMonitor.

It's also cross-platform (but only supports inotify and FSEvents). It's far less documented or developed than watchdog though. It dates back to April 15, 2009, i.e. long before watchdog existed. The fact that I did an extremely poor job of making File Conveyor's components separately visible is probably why you never found it.

Recently, File Conveyor has become very active again. Today, I stumbled upon watchdog. After the first stable release (1.0) of File Conveyor, I'd like to switch to watchdog, because I obviously can gain from this far more actively developed component :)

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