plus4emu 1.2.0 beta release

A beta release of version 1.2.0 is now available for download. Since this is not the final release yet, there are some new features that are still to be implemented, and bugs may need to be fixed.
Here is a list of changes since version 1.1.3:
* many improvements in the TV emulation; to enable all the new
features, use OpenGL mode and set the display quality to 3 (requires
OpenGL 2.0 or newer and shader support)
* added a tedmon-like monitor to the debugger; it supports all the
commands, including assemble, but there are also some improvements
and additional features (use ? to print the list of commands, or ? N
for help on command N)
* it is now possible to set breakpoints on TED video positions in the
debugger
* trace command in the monitor for logging CPU instructions to a text
file; when debugging the main CPU, the TED video position at the
first cycle of each opcode is also logged
* the file I/O ROM module now also includes a tape turbo; to enable
it, set $0647 to $17, $27, $37, or $47 to select speed (from slowest
to fastest), and use device 7 when saving
* tape playback and recording can be sent to the sound output
* the RAM startup pattern has been made configurable
* various bug fixes