fix: inputs/bien2_traits/TraitObservation/map.csv: mapped VisitingDate to eventDate

fix: inputs/*/*/map.csv: remapped occurrenceID-mapped fields to dataProviderRecordID when these were not globally unique DwC occurrenceIDs (http://rs.tdwg.org/dwc/terms/#occurrenceID)

inputs/bien2_traits/TraitObservation/postprocess.sql: remove rows with no taxon name, which are invalid, and which helps simplify the aggregating validations queries

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).

fix: bin/map: put template: comment out the "Put template:" label so that the output is valid XML, and displays properly in a browser rather than showing a syntax error

bugfix: mappings/VegCore-VegBIEN.csv: nest all taxonoccurrences inside a stratum event, so that the parent locationevent is always fully populated before child locationevents point to it. (previously, a stub parent event was created when the child event was imported first, which blocked the fully-populated parent event from being inserted later on.) this uses auto-folding (for VegBank/CVS) and auto-forwarding (for other datasources) to prune empty stratum events for taxonoccurrences that don't have strata. (see wiki.vegpath.org/Auto-folding, wiki.vegpath.org/Auto-forwarding for more info about these normalization techniques.) note that the inserted row counts stay exactly the same for all datasources except VegBank (which was being fixed), indicating that this signficant change to the mappings did not change the semantics of the import of taxonoccurrences.

inputs/*/*/test.xml.ref: updated source.shortname for new datasource name, which now starts out with .new suffix

inputs/*/ which do not contain any explicit collisions (wiki.vegpath.org/2013-06-27_conference_call#To-do-for-Aaron > #3.2 > the following datasources ...): switched to new-style import, which adds the staging table column renaming

inputs/*/*/map.csv: added distinguishing #... suffix (e.g. UNUSED#institutionID) to the special terms OMIT, PRIVATE, UNUSED (VegCore.vegpath.org#Special-terms) to avoid creating a collision in the staging table renaming

inputs/bien2_traits/TraitObservation/map.csv: removed no longer needed mappings of dummy columns to OMIT, which were creating an unnecessary collision of staging table column names