obsolete, replaced by other tutorial
second release wants a new in this release doc
add top and bottom to the list
date bump still tentative
fast summary is only for pipes
move merge with other sqlish features
export chain operators
factor out map making function
keyval.length is gone
typo
too aggressive arg cleanup
don't fail if cleanup not needed
document chain ops
where takes only one arg now
not sure what this file is
must specify a group size now, unfortunately
add .columns arg
underline generality
keep time col, makes result more understandable
add .vectorized arg and documentation