Implemented COP2_STUB simulation in SW simulator.
This COP2_STUB is a dummy COP2 included in the demo application module, used for tests.
Improved the cputest program to test part of the COP2 interface using COP2_STUB.
Modiied core and application test benches to include COP2_STUB module.
Implemented first draft of COP2 interface.
Unfinished, only MFC2 and MTC2 supported at the moment.
Included COP2_STUB module in application entity.