Updating README

README.md

@@ -2,9 +2,13 @@ The following tarballs are used when building the pre-requisit
 libraries for meteo codes such as WRF and CM1. Updated libraries are
 included. Older version are being kept for a while in the event an 
 older build script is run. As this repo grows, older ones should
-be removed to prevent the overall package from growin gtoo large.
+be removed to prevent the overall package from growing too large.
 
-List of files included.
+Note that other git repos (CM1, WRF) contain scripts that make a call
+to clone this repo in order to build these libraries. Those build scripts
+should be updated prior to deleting old libraries from here.
+
+List of files included:
 
 ```bash
 RIP_47.tar.gz