COMPAT: fwd and bkwd compatibility with fiona CRS (#913)
COMPAT: fwd and bkwd compatibility with fiona CRS (#913)

Background: https://github.com/Toblerity/Fiona/issues/714.
jdmcbr/geopandas,jdmcbr/geopandas,geopandas/geopandas,jorisvandenbossche/geopandas,geopandas/geopandas,jorisvandenbossche/geopandas,jorisvandenbossche/geopandas,geopandas/geopandas