GXemul Code2

Fixing a bug for MIPS R2000/R3000 when writing to coprocessor 0 "entrylo" register (if the lowest 8 bits were 0, the code took the non-R2000/R3000 code path).

Removing the UNSTABLE_DEVEL configure define; it was not used much, and the debugmsg verbosity levels can be used in its place.

Updating the TODO.

Updating the TODO.

Include time.h for gmtime() etc; needed on Linux but apparently time.h was included indirectly due to something else on FreeBSD.

Escaping newline like this did not work with bash. (Noticed when running configure on Linux.)

Include AArch64 and RISC-V in the list of theoretically possible archs.

Fixing an annoying 'backspace' bug in the debugger command ine handling, where the response sometimes could become unknown command ''. Implementing CTRL-W (erase word) in the debugger. Implementing CTRL-T (SIGINFO-like status line) in the debugger.

Do not count the break-out-of-dyntrans-loop-calls as executed instructions.

Mention the debugmsg stuff in the release notes.