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).

added lib/ints.py with renamings of max()->set_*min*(), min()->set_*max*() for easier understandability of the set-ceiling/set-floor use cases of min()/max()