update project metadata

in http://incubator.apache.org/guides/mentor.html#initial-ip-clearance

there's a section on updating maven, and we have some missing parts:

Update mailingLists
Update organization
Update url
Update issueManagement
Check licenses
Update scm
Update groupId
Update manifestEntries. It is recommended that the standard Apache settings are used
Update developers to use apache IDs (when known)
Update distributionManagement
Consider specifying a relocation