Refactoring on the audit logs implementation

Among of other things, it is now supporting shared file locks between
different process.

src/audit_log/writer/writer.cc

@@ -0,0 +1,30 @@
+/*
+ * ModSecurity, http://www.modsecurity.org/
+ * Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
+ *
+ * You may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * If any of the files related to licensing are missing or if you have any
+ * other questions related to licensing please contact Trustwave Holdings, Inc.
+ * directly using the email address security@modsecurity.org.
+ *
+ */
+
+#include "src/audit_log/writer/writer.h"
+
+#include <string>
+
+#include "modsecurity/audit_log.h"
+
+namespace modsecurity {
+namespace audit_log {
+namespace writer {
+
+
+
+}  // namespace writer
+}  // namespace audit_log
+}  // namespace modsecurity