Dataset Hoster Improvements

The dataset hoster currently returns rows of database rows with no extra information. Over time, the results that are returned from a query have begun to include markup in order to display more information to the user. The data structure which is currently being returned by the hoster should be simplified to make data consumption easier for callers. When an MBID is recognized in a cell of the output, we wish to show a drop-down button next to that MBID. The items of this drop-down should be a link to all of the data-sets that could be initiated with that MBID. For instance, if the user has made a search for a similar artist and the output shows a list of artists, next to each artist MBID, the dropdown should offer to run a new similar artist search and other searches that can be initiated with an artist MBID. These drop-downs would allow users to explore our connected datasets, which would be a great asset. Also, the project has accumulated some bugs over time, many of which remain unaddressed. These bugs need to be identified and fixed as required.