Jirakjan bp rebase

Merge code by Jan Jirak that resulted from his BP

alib2algo/src/string/properties/PeriodicPrefix.cpp

+/*
+ * PeriodicPrefix.cpp
+ *
+ *  Created on: 27.3.2020
+ *      Author: Jan Jirak
+ */
+
+#include "PeriodicPrefix.h"
+#include <registration/AlgoRegistration.hpp>
+
+namespace {
+
+auto PeriodicPrefix = registration::AbstractRegister < string::properties::PeriodicPrefix, ext::pair < ssize_t, ssize_t >, const string::LinearString < > & > ( string::properties::PeriodicPrefix::construct );
+
+} /* namespace */