Truffle/Instrumentation: first large merge of instrumentation code into the TruffleVM framework - introduce the Instrumenter class, held by the TruffleVM to support instrumentation services - reimplement Probe-realated services (formerly statics in Probe.java) to be provided by the Instrumenter- add new Accessors - change the TruffleVM startup sequence - change the APIs of the Debugger and many other classes

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