Now that we check header checksums, it uncovered a problem parsing 1160P event
headers. It turns out that the 1160P uses a "waveform" header for its .002
events files. So we can't use the file extension to decide which header to
parse, but there's a flag in the standard header that seems to reliably indicate
a waveform header. The 1160P events are listed at fixed intervals, as are
waveforms, so the flag has been named "interval" rather than "waveform."
The 1160P event headers have more than 2 signals in the header and an interval
longer than 1sec. This clarified the meaning of multiple waveform header fields
that were previously being parsed incorrectly.
Currently there is a very messy tangle of dependencies between
loaders, machines, sessions, and profiles. Right now the
simplest way to create a test loader instance is to create
a test profile, under which the machine and session instances
will exist.
