Should be able to run tests in parallel

[jeffallen]

For now, Coding/bin/Makefile.base uses -p=1 to run tests because some onet tests have port numbers hardcoded in them.

It should be possible to test without -p=1.

[ineiti]

Now: network/test* uses static port-numbers Wanted: use port-number 0 to search for a port

Now: Local is sometimes used to refer to localhost, sometimes to a Local connection that uses channel Wanted: Separate LocalNet from Localhost.