Add unit tests runner

run_unit_tests.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+echo -n "Running unit tests"
+for file in unittests/*.chai
+do
+  tstname=${file%.*}
+	tst="$tstname.txt"
+	./chaiscript_eval $file > /tmp/tstout.txt
+	diff $tst /tmp/tstout.txt
+	if [ "$?" -eq "0" ]
+	then
+		echo -n "."
+	else
+		echo "[from failed test $file]"
+	fi
+done
+echo "done"