benchmark.find-pi: adding the bignum ratio find-pi benchmark.
random-string: make letters and numbers equiprobable
1string string>number -> digit>
noise-ui, higher fps (x3)
rosetta-code.y-combinator, fix IN:
rosetta-code.y-combinator use inline instead of call( x -- x )
cleanup: with fry, _ call is @
rosetta-code.y-combinator: add ackerman functions to demonstrate several inputs
rosetta-code.image-noise: fix vocab name.
vm: make sure we zero out the end of the bignums.
random.data: make constants available to random.data.
extra/lint: Removed dup -rot -> tuck entry from manual-substitution table

tuck is deprecated. load-all shows a warning in the UI Listener as per #347
lint: disabling tuck test.
sequences.extras: adding "none?" and "one?".
sorting.extras: adding 'argsort'.
splitting: making split inline.
echo-server: switch to utf8.
echo-server: change to binary echo.
help.stylesheet: provide a mechanism to adjust the help fonts.
ui.tools.browser: adding +/- font size commands.