update readme to separately install float_raster

vor 8 Jahren · b108609503
Commit b108609503
--- a/README.md
+++ b/README.md
@ -19,4 +19,5 @@ Requirements:

 Install with pip, via git:

+>pip install --upgrade git+https://mpxd.net/gogs/jan/float_raster.git@release
 >pip install --upgrade git+https://mpxd.net/gogs/jan/gridlock.git@release