Work on #16: Support patterns

pattern/pattern.go

@@ -0,0 +1,12 @@
+package pattern
+
+import "path/filepath"
+
+// Match checks whether a string matches a pattern
+func Match(pattern, s string) bool {
+	if pattern == "*" {
+		return true
+	}
+	matched, _ := filepath.Match(pattern, s)
+	return matched
+}