REST API support for geo & full-text queries

View query options for geo are:
 ?full_text= (FTS query string)
 ?snippets (true to enable snippets in output)
 ?ranking (false to disable ranked sort order)
Output rows will have properties "matches" and maybe "snippet".

View query options for geo are:
?bbox (JSON array of 4 numbers: [x0, y0, x1, y1])
Output rows will have properties "geometry" and "bbox".