Skip *.script.wav files from Ineluki's Key Patch

[carstene1ns]

Currently, the log is spammed with

[2016-01-19 13:36:50] Warning: Couldn't load MidiTickOutput.script SE.
Unrecognized sound file type
[2016-01-19 13:36:50] Warning: Couldn't load KeyList.script SE.
Unrecognized sound file type
[2016-01-19 13:36:50] Warning: Couldn't load KeySupportOn.script SE.
Unrecognized sound file type
[2016-01-19 13:36:51] Warning: Couldn't load MidiTickOutput.script SE.
Unrecognized sound file type
[2016-01-19 13:36:51] Warning: Couldn't load KeyList2.script SE.
Unrecognized sound file type
[2016-01-19 13:36:51] Warning: Couldn't load KeySupportOn.script SE.
Unrecognized sound file type
[2016-01-19 13:36:51] Warning: Couldn't load MidiTickClear.script SE.

It is because the sound effects are used as triggers for scripts. While we cannot easily support the whole key patch (maybe we could write some - likely game specific - key wrapper logic after #491 is implemented), we should at least give a better message and only display it once per game launch.

This could be done like the infamous '(Brak)' check, "if SE ends with .script", then set a flag and display:
"Warning: Game uses Ineluki's Key patch, additional keys and scripts will not work!"

Besides the additional keys, this patch adds mouse support (was this even used by a popular game?)
and a buggy mp3 support (through *.link.wav files like disharmony? - not worth it)

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An example game using this patch is "Harvest Moon - Mondlichts Kinder", issue reported by mail.