Use DataSet.display or DataSet.displayKey?

[holtkamp]

When migrating from (the abandoned) https://github.com/twitter/typeahead.js to (the maintained) https://github.com/corejavascript/typeahead.js, I reviewed some configuration aspects and noticed that we use a callback function when configuring a DataSet with property name displayKey, while:

• the documentation uses display,
• the code accepts both

Is either display or displayKey preferred? Might it be an idea to add displayKey to the documentation? Or will it be deprecated

[holtkamp]

Since #128 was merged, I guess this can be closed