SDS_slope function missing using tide clipped_tide_files

[Badape12z]

When using the python file to clip the tide, the function get_region_from_geojson in SDS_slope does not work in the latest release.
Solution is to use the master branch version of the codeSDS_slope fixes the error.

[kvos]

thanks for reporting this. could you please describe the fix in more detail so I can push it for all? that'll be great