destructors: bad $slot documentation.
help.lint: add slot checking, don't check constants for $values.
update docs for help.lint checks.
help.lint: remove old word.
destructors: s/three slots/two slots/.
tzinfo: adding parsers for timezone files.
tzinfo: adding tests for normalize.
math.extras: two versions of search-sorted.
sequences.extras: adding ?first{2,3,4}.
math.extras: remove accidental test.
math.extras: faster search-sorted by bisecting.
tzinfo: make it easy to load zoneinfo files.
sequences.extras: adding cut-when.
html.parser.printer: some tweaks to the text-printer for my blog.
sorting.extras: adding bisect-right and bisect-left.
math.extras: switch to using sorting.extras.
VM: Three new special objects added to keep track of the builds version number, git label and compilation time respectively. The info is exposed in the system:version-info word and also shown in the banner during startup.
VM: renamed version and git-label to vm-version and vm-git-label.
VM: using make vocab instead of consecutive appends
Merge branch 'improve-banner' of https://github.com/bjourne/factor into improve-banner