Detect beep.wav audio format, use for playback

[joelpurra]

Simple patch which should fix playback problems on Ubuntu.
http://stackoverflow.com/questions/18942424/error-playing-audio-file-from-java-via-pulseaudio-on-ubuntu

@jetthe test please.

[jetthe]

Better but not perfect. My test results:
Version 3.0.2
openjdk-7-amd64: No beep, nothing. Same error message on the console as in the stackoverflow link.
java-8-oracle: Sporadic beeps, maybe every 10th turn. No error message.
java-7-oracle: Sporadic beeps, maybe every 10th turn. No error message.

Version 3.0.2 with patch
openjdk-7-amd64: Beep on every turn.
java-8-oracle: Sporadic beeps, maybe every 10th turn. No error message.
java-7-oracle: Sporadic beeps, maybe every 10th turn. No error message.

Versions:
openjdk-7-amd64
java version "1.7.0_65"
OpenJDK Runtime Environment (IcedTea 2.5.3) (7u71-2.5.3-0ubuntu1)
OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)

java-7-oracle
java version "1.7.0_72"
Java(TM) SE Runtime Environment (build 1.7.0_72-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.72-b04, mixed mode)

java-8-oracle
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)

[joelpurra]

@jetthe: investigated it a bit further, and tried preloading the audio clip into memory on first use. Please have a look at it again =)

[jetthe]

@joelpurra Woop! c7afea0 works great on both oracle-java and openjdk.

[joelpurra]

@jetthe: great! Hope the maintainers agree.

[farin]

great job. thanks