International Reference Ionosphere (IRI) Model

Removed the iri2007 version because it no longer works.
Updated iri2012 version so that it is compatible with the new website interface.
Added iri2016 version that uses the newer IRI model.

Fixed issue with non-leap year day of year sweeps (as pointed out by Cory in comments above).

Fixed error in input argument order in the list in the initial comment block for the iri2012 function.

Made iri2012 compatible with new online interface having auroral boundary option.

Added more information on inputs in initial comment block, provided functions to call both IRI-2007 and IRI-2012, added capability to run functions in a parfor loop, changed output from multiple vectors to single matrix.

Fixed some problems in sweeping day of year/month/etc.

Fixed problem where online interface would hang without returning anything for some inputs (including in iritest.m).

Fixed bug pointed out by Brandon (old line 459 actually I believe, not 496) and also fixed an odd issue with the online interface output for longitude sweeps and non-default altitude (first noticed by John H.).

Updated initial comment block, added an error check on calling curl, fixed/updated some of the other error checks, and added capability to run example script without Mapping Toolbox.

Fixed geocentric coordinate conversion bug.

Fixed a problem where the online interface didn't do a full sweep for fractional steps and added an error check on reading temp.html from the interface.

Fixed some more typos in the comments of the files and made the changes suggested in Allen Kummer's comments.

Fixed typo in title/description.