adding authors listing tool and initial AUTHORS file

AUTHORS

@@ -0,0 +1,24 @@
+# Authors ordered by first contribution.
+
+Jessica Orquina <orquina.jessica@epa.gov>
+Michael Tryby <tryby.michael@epa.gov>
+sam hatchett <samhatchett@gmail.com>
+Feng Shang <fshang>
+James Uber <jim@citilogics.com>
+Sam Hatchett <samhatchett@gmail.com>
+Tom Taxon <tntaxon@anl.gov>
+Hyoungmin Woo <woohn@mail.uc.edu>
+Mickey <hyoungmin.woo@gmail.com>
+JinduanChen <jinduan.uc@gmail.com>
+mickey <hyoungmin.woo@gmail.com>
+yuniersoad <yunier.soad@gmail.com>
+jamesuber <jim@citilogics.com>
+Mike Kane <muke195@gmail.com>
+eldemet <eldemet@gmail.com>
+Will Furnass <will@thearete.co.uk>
+Steffen Macke <sdteffen@sdteffen.de>
+Mariosmsk <mariosmsk@gmail.com>
+Elad Salomons <selad@optiwater.com>
+Demetrios Eliades <eldemet@gmail.com>
+
+# Generated by tools/update-authors.sh