set a fix surefire plugin version to have same conditions on all machines
rm ant files; fixes #31
set java source and target version from 5 to 6
remove a needless String length check; fixes #33
rm maven github plugin as we release to mvn central now
Merge branch 'master' into remove_apps

Conflicts:
	src/test/java/com/mpatric/mp3agic/app/Mp3RetagTest.java