Fix settings: organization/homepage settings

The resulting POMs now look like this:

    <url>https://github.com/gtri/typesafeconfig-extensions</url>
    <organization>
        <name>Georgia Tech Research Institute, CTISL</name>
        <url>http://gtri.gatech.edu/ctisl</url>
    </organization>
Merge pull request #4 from chris-martin/pom-urls-and-org-name

Fix organization/homepage settings