Support for Java 8

[cogumbreiro]

Since the idea is to use java.util.function code, I'm wondering why aren't lambdas expected.

Here is my ProgramPassTest.java

public class PassProgramTest extends TestSuite
{
	@Override
	protected Function<List<String>,String> makeTestable()
	{
		return x -> {
		    StringBuffer buff = new StringBuffer();
		    Iterator<String> iter = x.iterator();
		    while (iter.hasNext()) {
		        buff.add(iter.next());
		    }
		    return buff.toString();
		};
	}
}

However, mvn test fails:

[ERROR] /home/tiago/Work/trialpack/src/test/java/PassProgramTest.java:[25,26] lambda expressions are not supported in -source 1.5
  (use -source 8 or higher to enable lambda expressions)

[rmbarnett-rice]

That's just the Maven default language level. I don't see why we couldn't change it to Java 8.