since ito makes using package tools hard, is marked as FATAL by
portlint and otherwise doesn't affect the port, fix it silently.
Approved by: marcus (mentor)
- Put .pc file in the right location.
- Put docs in renderext, to match other extensions.
- Update pkg-descr for new website and description.
- Fix up pkg-plist a little (Still needs NOPORTDOCS work, like other x11 ports)