GXemul Code2

Experimenting with moving the rpath flag to always be used.

Also check for X11R7 in the configure script, in addition to X11R6.

Moving the LUNA88K framebuffer to its own device file. Beginning to implement the LUNA88K front panel LCD. Also fixing a bug where the rightmost pixel (or 8 pixels in the case of monochrome) were not drawn.

Updating the TODO.

Do not print idle message when stopping a machine.

Copyright update.

Implementing an X11 mouse pointer grab mechanism. Grab is activated by clicking in a framebuffer window, and released using left CTRL + ALT. When grab is active, the host mouse cursor is hidden and the window caption changes to indicate that grab is active.

mvme187old -> mvme187

Code for idling the host processor has been moved out from individual CPU implementations to the main emul loop. Only if all running CPUs in all machines are idling will the host CPU idle. Also, if the return value from usleep() indicates an aborted syscall (due to signal delivery), then a second usleep() call is attempted.