fixed bug and created script for running tests

tests/run_tests.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+mapfile -t files < <(find ../tests/. -name "*.ics")
+
+i=1
+for file in ${files[@]}; do
+	echo "TEST ${i}: ${file}"
+	echo "===================================================="
+	../src/icscli -f "${file}"
+	echo "===================================================="
+	echo
+	((i++))
+done
+
+exit 0