allow defining pascal functions
hack 68000-compatible replacement for RTD instruction into asfilter
magicinline is dead, long live raw_inline
remove lots of stuff from PrepareHeaders
silence some debug output
make sure that output_call is actually called
glue code must be declared pascal
support #pragma parameter
PrepareHeaders.hs is no longer needed.

Instead, there is prepare-headers.sh which only needs to patch ConditionalMacros.h