+- Experimental feature: Range query over natural ranges, ie. numeric or alphabetical.
+- Examples: `2000-2008`, `year:2000-2008` (adding a qualifier is recommended, faster and usually known). Though: Use `year:200*` if you want fixed ranges `2000-2009`, `2010-2019`, etc.
+- Be clever in your use of ranges. If they are not flexibly chooseable by the user, don't use them. Be also wary in this initial version of huge range: `0-1000000` is a bad idea. If your range encompasses all values, simply don't use a range query.