Update README

README.md

@@ -2,3 +2,8 @@ DDNet maps
 ==========
 
 All official [DDNet](https://ddnet.tw/) maps, ready to be run in your own server! Simply download this repository, add your DDNet-Server binary (distributed together with the DDNet client) and start the server. You can change the settings in autoexec_server.cfg
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+To download this repository you have two choices:
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+1. [Download the ZIP](https://github.com/ddnet/ddnet-maps/archive/master.zip) and you get a current snapshot of all maps, but can't easily update it.
+2. `git clone https://github.com/ddnet/ddnet-maps` and you have the full history of this git repository. To update your copy of maps simply execute `git pull`.