Partial Simulation

[LinqLover]

see #todo comment

Next steps:

• have a look at Context>>#quickStep and see how it can help us - are we reinventing a 🎡 here?
• investigate cause of VM crashes during debugging
• improve support for exception handling
• create specializations in #wantsToSimulate: (maybe pluggable for better reuse?) to support scenarios such as Tool: SimulationTestCoverage #53 or Mechanism to exclude methods from tracing hpi-swa-lab/squeak-tracedebugger#39
• add tests

Will close #54.

[LinqLover]

Testing sample: TestObject3.st.txt