fix: exports/.rsync_filter.upload: *.csv: don't allow test runs' exports to overwrite the backed up ones

*{.sh,run}: runscript targets: use begin_target instead of echo_func so the target name is properly echoed. note that this requires using with_rm so that $rm is properly progagated to applicable invoked targets. (previously, $rm was progagated to all invoked targets. note that with_rm only works inside a runscript target that starts with begin_target.)

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).

exports/2013-7-10.Naia.range_limiting_factors.csv.run: updated export_() runtime and rowcount (~ the same)

added exports/geoscrub_input.csv.run

exports/2013-7-10.Naia.range_limiting_factors.csv.run: added rowcount (40 million of 80 million observations, filtered w/ cultivated, geovalid, and various fields NOT NULL)

exports/2013-7-10.Naia.range_limiting_factors.csv.run: updated export_() runtime

exports/2013-7-10.Naia.range_limiting_factors.csv.run: export_(): documented runtime (10 min)

added exports/2013-7-10.Naia.range_limiting_factors.csv.run

bugfix: exports/2013-10-18.Brian_Enquist.Canadensys.csv.run: do not override the table to analytical_stem, because the extract-specific view should be used instead. this was actually benign, because extract.run export_() always sets $table to the extract-specific view.