CHG: adding other way to download ISSM from GitHub

README.md

@@ -1,15 +1,18 @@
 # ISSM
 
 ## Description
-Ice-sheet and Sea-level System Model (ISSM): a framework for modeling ice flow on ice sheet/ice shelf systems using Finite Element Analysis, and parallel technologies.
+Ice-sheet and Sea-level System Model (ISSM): a framework for modeling ice flow using Finite Element Analysis, and parallel technologies.
 
 ## Contact
-Email: issm at jpl dot nasa dot gov
-
-Website: https://issm.jpl.nasa.gov/
+ - Website: http://issm.jpl.nasa.gov/
+ - Forum: https://issm.ess.uci.edu/forum/
 
 ## Checking Out a Copy of the Repository
 Navigate to the parent directory where you want the ISSM repository to be located and run,
 ```
 git clone https://github.com/ISSMteam/ISSM.git
 ```
+or
+```
+git clone [email protected]:ISSMteam/ISSM.git
+```