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Very low-level ctypes-based interface to Linux inotify(7).
ctypes and a version of libc which supports inotify system calls are
required.
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Unify all the possible exceptions that can be raised by the INotify API.
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Create an inotify instance and return the associated file descriptor.
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Add a watch for the given path to the inotify file descriptor, and return
the watch descriptor.
@param fd: The file descriptor returned by C{libc.inotify_init}.
@param path: The path to watch via inotify.
@param mask: Bitmask specifying the events that inotify should monitor.
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Remove the given watch descriptor from the inotify file descriptor.
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Initialize the module, checking if the expected APIs exist and setting the
argtypes and restype for C{inotify_init}, C{inotify_add_watch}, and
C{inotify_rm_watch}.
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