version 8.12
- improved C128 support
- removed broken floating point support from c128 target (its FP routines are currently incompatible with prog8)
- cx16 api change: renamed cx16.push/pop_vera_context() to save/restore_vera_context()
- cx16: added cx16.poweroff_system() and cx16.set_leds_brightness()
- cx16: fix golden ram area
- various bugfixes