update _includes/item_metadata.html to deal with fields that have type link but are also an array

[amzoss]

or could create a new type for these fields

this happens in datasets, had to comment out a link type in the labels_datasets layout to allow the URL array to pass through correctly

[amzoss]

this should be working with new updates. now using data dictionary to pull in labels, and data dictionary has been updated to include type indicators for things like links and internal examples. the item_metadata include matches page metadata up with data dictionary labels and types, then uses conditionals to change display for different kinds of items.