add some default facets to the dataset search page: 'Agency' and 'Subject Area 1'
fix the spurrious renaming fix: handle the case of a name clash on a new dataset (see 1ce01c097737a61e63a0436d78ee10632bc80292)
add 'filters' to harvest source configuration options so we can harvest only datasets that, for instance, have a certain 'theme' value