I don't necessarily think this PR brings chibi up to par with the other scheme
implementations, but it does improve quite a few things.
- (analyze) was sometimes causing hangs and throwing warnings, but it doesn't
 seem to be necessary for calling (eval), so I removed it.
- I got autodoc back to a somewhat working-ish state which throws fewer
 exceptions overall.
- I removed the default extra command line parameters, since they didn't seem to
 be necessary.