test/: Add a couple of black-box tests for items

This introduces five test suite failures which will be fixed in one of
the following patches.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

test/appointment-014.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+"$CALCURSE" --read-only -D "$DATA_DIR"/ -c "$DATA_DIR/apts-appointment-014" \
+  -d02/23/2013 2>errors && exit 1
+grep -Fq 'syntax error in item time or duration' errors