Update README.md

Author: msrosenberg

README.md

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 # PySSaGE
 
-PySSaGE is a collection of python versions of analyses originally part of the *PASSaGE* (Rosenberg 2001) and [*PASSaGE* 
-2]((https://www.passagesoftware.net)) (Rosenberg and Anderson 2011) software packages for spatial analysis.
+PySSaGE is a collection of python versions of analyses originally part of the *PASSaGE* (Rosenberg 2001) and *PASSaGE* 
+2 (Rosenberg and Anderson 2011) software packages for spatial analysis.
 
 See the [PySSaGE wiki](https://github.com/msrosenberg/pyssage/wiki) for more information.