Update INI and README to reflect new ownership

[jimsafley]

This module has recently changed ownership from "Roy Rosenzweig Center for History & New Media" to "Omeka Team". We should reflect this change in the INI and README files.

In the INI file, change author, author_link, and support_link. Change module_link once the module has an entry in the user manual. Add a dev_link once the module has an entry in the developer documentation.

Rewrite the README file to reflect old and new ownership.