bin/tnrs_client: added env var to configure use_tnrs_export
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).
lib/tnrs.py: repeated_tnrs_request(): renamed to tnrs_request() since this is the function that should usually be used, to ensure that debugging information is output in the case of an error. (the TNRS request must be made again to output this information.)
TNRS-related programs: Use "names" instead of "taxons" for variable names because what's being submitted are actually verbatim taxonomic names, not official references to specific taxa
tnrs_client, tnrs_db: Use new tnrs.repeated_tnrs_request()
tnrs.py: tnrs_request(): Return the CSV stream directly instead of reading it into a string
tnrs.py: tnrs_request(): Return the response instead of printing it to stdout
tnrs_client: Use new tnrs.tnrs_request()
tnrs_client: Factored TNRS request code into separate function tnrs_request()
tnrs_client: Support parsing multiple taxons at once, by specifying each as a command-line argument. Increased the max_pause to 10 min to support large batches. Limited the batch size to 5000 names, using the limit at <http://tnrs.iplantcollaborative.org/TNRSapp.html>. Note that when using xargs to pass many names, xargs will by default split its arguments into chunks of 5000. You can change this using the -n option.
Added tnrs_client. Note that obtaining an actual CSV requires four (!) steps: submit, retrieve, prepare download, and download. The output of the retrieve step is unusable because the array has different lengths depending on the taxonomic ranks present in the provided taxon name. This initial version runs one name at a time, but could later be expanded to batch process because TNRS can run multiple names at once.
