minor updates to unit tests
add name_that_location() to symbols.pm to avoid code duplication even though this makes the API inconsistent.  previously, all methods AUTOLOAD to being symbols from the assembly.
init file for stella to break when execution hits the 'ranoutoftime' label or if we try to draw more than 262 scanlines
dicking with timers again; added experimental platrenderline2 timer check that makes sure that there are abs( lastline - curline ) + 2 > INTIM cycles available and bails on the call if not.
don't know why, but scanlines go over (up to 266 in one case) still, but otherwise this avoids having to check for a large constant (21 timer tickers) before drawing anything.
small test fix
update note