org.jmacs 2.2

• IDiDriver becomes IDi.IDriver (logical consequence of previous move from IDiClient to IDi, if we are to be consistent)
• IDi.terminate() dispensed with: now specify that deployer must unbind() after use. Thus, we get a simpler API and impl'n--terminate() is a little onerous--in exchange for having to terminate resources every time we explicitly unbind().

• IDi: void bindOrReturn() becomes boolean bindIfAvailable()