Update README.md

Author: manez

README.md

@@ -16,6 +16,10 @@ Install as usual, see [this](https://drupal.org/documentation/install/modules-th
 
 N/A
 
+## Documentation
+
+Further documentation for this module is available at [our wiki](https://wiki.duraspace.org/display/ISLANDORA/PHP+Lib).
+
 ## Troubleshooting/Issues
 
 Having problems or solved a problem? Check out the Islandora google groups for a solution.
@@ -31,7 +35,7 @@ Current maintainers:
 
 ## Development
 
-If you would like to contribute to this module, please check out our helpful [Documentation for Developers](https://github.com/Islandora/islandora/wiki#wiki-documentation-for-developers) info, as well as our [Developers](http://islandora.ca/developers) section on the Islandora.ca site.
+If you would like to contribute to this module, please check out [CONTRIBUTING.md](CONTRIBUTING.md). In addition, we have helpful [Documentation for Developers](https://github.com/Islandora/islandora/wiki#wiki-documentation-for-developers) info, as well as our [Developers](http://islandora.ca/developers) section on the [Islandora.ca](http://islandora.ca) site.
 
 ## License