Quick beta before "WB replacement" authors tear their hairs while adding 68060 support because of emulation bugs

Beta 3:

- CPU/FPU on the fly change fixes
- report 68060 EC/LC ID in PCR register when FPU not enabled, 68040/60 FPU disabled exception emulated.
- some 68030 MMU instructions had incorrect instruction length (no, MMU is NOT emulated but MMU instructions are still processed normally instead of reporting illegal instruction because some programs expect MMU and most/all 68EC030´s don´t report exceptions either, they simply have MMU that does not work 100%)
- http://aminet.net/util/sys/Mu680x0Libs.lha appears to be free, working replacement for 680x0-libraries. 68030 (didn´t work in b2), 68040 and 68060 with or without FPU confirmed working.
- FPU state restore fixed
- added CPU/FPU frequency to state files (not yet really used except sets A500 speed if stored statefile was A500-speed config)
- added 68030+ control register statefile support
- 1340b4 "rare divide by zero error..." really fixed..