When the `serve` and `livereload` targets are invoked, a web browser will be
automatically opened, pointing to the locally-served website.
If no web browser can be found by the module, the `open()` call returns
`False`, but no exception is raised. This means that it is still possible
to call livereload on a remote machine and access it without any error
being triggered.
Signed-off-by: Romain Porte <microjoe@microjoe.org>
a00284f744