Require Java 1.6 for building for release, in order to force unit tests to be run with 1.6 JVM.

git-svn-id: http://svn.code.sf.net/p/picard/code/trunk@1498 8bce386e-0d6e-43e0-b1ca-608082c0432d
Move cofoja.jar to subdirectory so it is not packaged with Picard jars

git-svn-id: http://svn.code.sf.net/p/picard/code/trunk@1499 8bce386e-0d6e-43e0-b1ca-608082c0432d
Merge remote-tracking branch 'upstream'