planning/timeline/timeline.2013.xls: provide scientists with their requested data: added separate subtask for Brian Enquist's Canadensys extract

planning/timeline/timeline.2013.xls: updated for progress and revised schedule

bugfix: schemas/pg_hba.Mac.conf: made same change for Mac as was made for Linux in r11451

bugfix: schemas/pg_hba.conf: don't allow ident authentication for Unix socket connections, because this apparently prevents having normal, password-based connections ("md5"). note that just switching the order of the ident and md5 entries is not useful, because whichever authentication type comes second will be ignored completely. this problem was previously worked around by just not using Unix socket connections at all, and always specifying "localhost" as the host to force a hostname-based connection. this does not affect the postgres superuser, because they have their own ident line in pg_hba.conf.

Added db user and host to load-geoscrub-input.sh

The psql commands in load-geoscrub-input.sh will now connect with a
specific user on a specific host.
Updated the 'COPY' sql statement to a '\COPY' statement, so that the
psql user does not have to be a PostgreSQL superuser.

derived/biengeo/README.txt: geoscrub new data: steps that use .sql scripts: added the psql commands to run these

Updated install instructions in the README.

derived/biengeo/README.txt: geoscrub new data: noted that this now deletes any previous geoscrubbing results

derived/biengeo/README.txt: added steps to set the working dir for each set of steps

derived/biengeo/README.txt: added section on obtaining source code, including path to Paul's in-progress files on vegbiendev (not sure whether the in-progress files are needed to run the core scripts in steps 1-6)