moved everything into /trunk/ to create the standard svn layout, for use with tools that require this (eg. git-svn). IMPORTANT: do NOT do an `svn up`. instead, re-use your working copy's existing files with `svn switch` (http://svnbook.red-bean.com/en/1.6/svn.ref.svn.c.switch.html).

*{.sh,run}: use new log-() instead of log+() with a negative #

lib/sh/binsearch.sh: binsearch(): also echo_vars the iter_num, to track how close binsearch is to finding the value (it will always take the same # iters, log2(max - min) )

lib/sh/binsearch.sh: binsearch(): also echo_vars the min/max so these can be used as shortcut inputs if binsearch is run again

lib/sh/binsearch.sh: binsearch(): doc comment: fixed typo in "truncates"

lib/sh/binsearch.sh: binsearch(): echo $i at log_level 1 so it's displayed by default, as a progress indicator

lib/sh/binsearch.sh: binsearch(): echo $i at log_level 1 so it's displayed by default, as a progress indicator

lib/sh/binsearch.sh: binsearch(): echo the command being run using new echo_run()

added lib/sh/binsearch.sh