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).

Renamed bin/errors_filter_* to filter_errors_* to sound more natural and to have a different prefix than error_stats so that both can easily be tab-completed at the command line

Added errors_filter_before and errors_filter_after to prepare `map` error messages for easy filtering and then restore line breaks