Add report for nodewords custom paths

The nodewords module has gone through a lot of changes in the last year. It used to (version 1.0) only handle meta tags for nodes (thus the name). So, you had to use the nodewords_bypath module if you wanted to add meta tags based on path (for pages that are not based on nodes). Since nodewords 1.1, the nodewords module allows you to define meta tags based on custom paths.

Add a new report, similar to the nodewords_bypath report, that shows info from the nodewords custom path data.