Added base test case for ProcessHandle
Added processSpawner to the Oisd class
Continuing the TDD implementation of Oisd
Reattached the new TDD implemtation of the ProcessSpawner into the Oisd class.
The design will change greatly in the next days. The context will be cloned from
the Oisd class which will provide a new working directory for the builder.
I believe the prototype-oisd can be ported safely into the development code, however
the whole build scheduling and dispatching subsystems need improvements.