donaldh first hack on sockets for JVM.
Initial ops for socket IO using NIO.
Added server socket and process pipe to IO.
Add nqp::openpipe tests (JVM only)
Add nqp::setinputlinesep for JVM.
Fudged the chdir tests on jvm.
Merge pull request #121 from perl6/donaldh-sockets

Implement sync sockets, pipes on JVM using NIO.