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The options for kdialog in KDE use double dashes

Changes include:
- time format now shows h/m/s (only when needed!)
- adds hooks only for interactive connections
- adds specific kde support (via kdialog)
- adds click-action for OS X terminals

Fixed error with spaces in commands

This patch will re-order the if statements when checking what operating
system the user is running.

This is useful for people that already have a `notify-send` binary in
their $PATH but are running OSX. An example of such requirements is
anyone running `vagrant-notify` is required to have a `notify-send`
binary on their $PATH.

See [link](https://github.com/fgrehm/vagrant-notify#os-x).

- maybe someday use GetForegroundWindow() from User32.lib ...