- added verification of the existence of simulator registers which they are referenced.
- sim_frontpanel API version checking to make sure that the invoking API and the simulator support the same capabilities.
- added the ability for a simulator to reference data in simh register data which is not in the set of registers defined in the default simh device (usually the CPU).
- added a simulator time reference relating to a set of register data which is provided.
- added example automatically creating a console terminal port from a simulator startup (front panel or not).
