lib/runscripts/table.run: table_make(): run canon_rel_path on the datasrc dir so it's displayed as the direct path to it, without ..

lib/runscripts/table.run: table_make(): moved comment about "${@/#/$table/}" to right after the line it describes

lib/runscripts/table.run: input_make(): renamed to table_make() to make it clear that the target names are relative to the table subdir itself, not the datasrc dir. it was previously called input_make because it used inputs/input.Makefile directly, but now will use any Makefile in the datasrc dir.

added inputs/GBIF/Makefile, which links to ../input.Makefile, to allow running make directly in the datasrc dir (i.e. without --makefile=.../input.Makefile). this is required by the runscripts.

inputs/GBIF/raw_occurrence_record/run: table.tsv.md5/make(): don't add extra .md5 extension to $target_filename because it already has the extension as part of the target name (now that this command is run in its own make target rather than in table.tsv/make())

lib/sql_gen.py: import OrderedDict from collections instead of ordereddict for Mac 10.8 Mountain Lion upgrade

lib/sh/util.sh: logging: renamed $log_level_indent to $log_indent_step to avoid confusion with the log_level, which is a different kind of indent (using + signs instead of |s)

lib/sh/util.sh: logging: also export PS4, because it follows verbosity and therefore also needs to be propagated to invoked commands

lib/sh/util.sh: can_log(): support decimal verbosities using round_down()

lib/sh/util.sh: always use echo_export instead of export, even when the verbosity at load time would suppress output, because the verbosity may actually increase during the script due to log-- calls, etc., and vars should then still be echoed as expected