GXemul Code2

Adding disassembly of 88K "tcnd", and treating tcnd ne0,r0,x as a nop (since r0 is always zero).

Adding check for INFINITY in C99 math.h, in order to fail early if the compiler is not working.

Preparing for a quick 0.7.0 release...

Fixing a bug where console input could randomly be lost when idling, if there were multiple emulated serial ports.

Enabling idle detection for OpenBSD/luna88k, which uses a bcnd.n instruction. A hack, but it seems to work.

Adding expect scripts for booting OpenBSD/luna88k.

Some int to bool conversion, and also making debugger_n_steps_left_before_interaction hidden inside the debugger module.

Fix some warnings and exit() cases.

Fix warning about size of buffer.

Use C99 INFINITY.