challenge grammar added

psConfig/exercise/challenge.conf

+[main]
+startdb=43;
+uttdb=47;
+silence=400;
+timeout=8;
+openDeviceDirectly=yes;
+
+[pocketsphinxinstance]
+name=confirm;
+jsgf=../../psGrammar/confirm/confirm.jsgf;
+rsbscope=/speechrec/psa/confirm;
+bestpath=no;
+autoload=yes;
+
+[pocketsphinxinstance]
+name=challenge;
+jsgf=../../psGrammar/exercise/challenge.jsgf;
+rsbscope=/speechrec/psa/jkummert;
+bestpath=no;
+autoload=yes;
+

psConfig/exercise/jkummert.conf

+[main]
+startdb=43;
+uttdb=47;
+silence=400;
+timeout=8;
+openDeviceDirectly=yes;
+
+[pocketsphinxinstance]
+name=confirm;
+jsgf=../../psGrammar/confirm/confirm.jsgf;
+rsbscope=/speechrec/psa/confirm;
+bestpath=no;
+autoload=yes;
+
+[pocketsphinxinstance]
+name=calculator;
+jsgf=../../psGrammar/exercise/calculator.jsgf;
+rsbscope=/speechrec/psa/jkummert;
+bestpath=no;
+autoload=yes;
+

psGrammar/exercise/calculator.jsgf

+
+#JSGF V1.0;
+grammar calculator;
+
+public <calculate> = <zahl> <operator> <zahl>;
+
+<zahl>=(zero|one|two|three|four|five|six|seven|eight|nine);
+<operator>=(plus|minus);
+

psGrammar/exercise/challenge.jsgf

+#JSGF V1.0;
+grammar challenge;
+
+public <command> = (<wait>)|(<drink>);
+
+<wait>=(wait here);
+<drink>=(fetch (coke|coffee|milk));
+

psGrammar/exercise/jkummert.jsgf

+#JSGF V1.0;
+grammar jkummert;
+
+public <command> = (<tobi>|<biron>) (<door> | <joke>);
+
+<tobi>=(tobi);
+<biron>=(biron);
+<door>=(go to the door);
+<joke>=(tell me a joke);