api: add the excludeFiles query parameter
api: add the excludeFiles query parameter

Set the index search options ExcludeFileRegexp with this parameter
to allow excluding files from the search via a regexp.

Kareo/Hound,gwindes/Hound,Kareo/Hound,gwindes/Hound,Kareo/Hound,Kareo/Hound,gwindes/Hound,gwindes/Hound,Kareo/Hound