[PR-1] Documentation updated

Submitted by: Kristian Rosenvold

KristianRosenvold: Added bits about merging pull requests

README.md

@@ -8,6 +8,9 @@ github, which may be found at [](https://github.com/SeleniumHQ/selenium).
 We accept pull requests from github. When making the pull request, please indicate that
 you have filled in the [CLA](https://spreadsheets.google.com/spreadsheet/viewform?hl=en_US&formkey=dFFjXzBzM1VwekFlOWFWMjFFRjJMRFE6MQ#gid=0)
 
+Merging pull requests cannot be done with the Github gui. The email sent from github can be used on
+your local repository or you can use the "power git checkout" at the bottom of [](http://maven.apache.org/developers/conventions/git.html).
+
 
 [Selenium 2.0](http://code.google.com/p/selenium/) builds with
 **its own build technology** called