Maven: make Java version configurable & set it to 6 & allow to compile with old JDK
Maven: make Java version configurable & set it to 6 & allow to compile with old JDK

Java version was changed from 1.5 to 1.6, because there are 3 lines in the code
that require Java 6, and where the Java 5 alternative would be uglier.

To (really) compile with an old JDK (version 6),
set the environment variable JAVA6_HOME,
and then activate the maven profile 'compileWithOldJava',
for example like this:

	mvn -P compileWithOldJava compile

lvdbor/JavaOSC,hoijui/JavaOSC