Updated Readme.md

Added repository cloning rules.

Author: cristianraiber

README.md

@@ -1,3 +1,11 @@
++# Repository clone/download :fire: :fire: :fire:
+ +
+ +This repository contains a git sub-module and as such, can not be completely downloaded using the web-interface of GitHub. This is a known limitation of GitHub's own tools. However, cloning this repository via CLI works absolutely fine and will pull all sub-modules as long as you use the proper commands. 
+ +
+ +Here's a short tutorial on how to achieve this as well as a better explanation of what Git sub-modules are and how they're useful: https://gist.github.com/gitaarik/8735255
+ +
+ +Easiest way to go about cloning a repository recursively is to use (Windows only) TortoiseGIT: https://tortoisegit.org/.
+
 # Shapely
 
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