MIN: change in georef to make use of `create_osr` instead of `create_projstr`
MIN: change in georef to make use of `create_osr` instead of `create_projstr`

--HG--
branch : feature/georef

kmuehlbauer/wradlib,heistermann/wradlib,kmuehlbauer/wradlib,heistermann/wradlib,wradlib/wradlib,wradlib/wradlib