new grammar for asking for exact beacons

psGrammar/tasks/gpsr/beacons.jsgf

+#JSGF V1.0;
+grammar speechRecognition;
+
+public <sentence> = [<talking>] <beacon>;
+
+<talking> = <verb> | (the [exact] (beacon | location | place) is) | it is the | at the;
+
+<verb> = (<V_meet> | <V_describe>) the person at the;
+
+<V_meet>      = meet | contact | get to know | get acquainted with;
+<V_describe>  = describe;
+
+<beacon> = (living table) | sofa | (comfy chair) | fridge | kitchen counter | sink | stove | cabinet | bar;