add getcode convenience function (thanks to Jachym Cepicky for patch)
add getcode convenience function (thanks to Jachym Cepicky for patch)

gfusca/OWSLib,geopython/OWSLib,JuergenWeichand/OWSLib,mbertrand/OWSLib,daf/OWSLib,tomkralidis/OWSLib,kwilcox/OWSLib,jaygoldfinch/OWSLib,kalxas/OWSLib,QuLogic/OWSLib,KeyproOy/OWSLib,menegon/OWSLib,datagovuk/OWSLib,daf/OWSLib,geographika/OWSLib,robmcmullen/OWSLib,ocefpaf/OWSLib,datagovuk/OWSLib,daf/OWSLib,dblodgett-usgs/OWSLib,Jenselme/OWSLib,b-cube/OWSLib,bird-house/OWSLib,jachym/OWSLib,jaygoldfinch/OWSLib,datagovuk/OWSLib