Drop "private" subfolders

"private" subfolders violate the structure of the project,
since the existence of all other subfolders is based on a
different principle.
In addition, there is no clear line between "private" and
"non private".

src/base/bittorrent/speedmonitor.cpp

@@ -0,0 +1,60 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2015  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2011  Christophe Dumez <chris@qbittorrent.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "speedmonitor.h"
+
+SpeedMonitor::SpeedMonitor()
+    : m_speedSamples(MAX_SAMPLES)
+{
+}
+
+void SpeedMonitor::addSample(const SpeedSample &sample)
+{
+    if (m_speedSamples.size() >= MAX_SAMPLES) {
+        m_sum -= m_speedSamples.front();
+    }
+
+    m_speedSamples.push_back(sample);
+    m_sum += sample;
+}
+
+SpeedSampleAvg SpeedMonitor::average() const
+{
+    if (m_speedSamples.empty())
+        return {};
+
+    const qreal k = qreal(1.) / m_speedSamples.size();
+    return {m_sum.download * k, m_sum.upload * k};
+}
+
+void SpeedMonitor::reset()
+{
+    m_sum = SpeedSample();
+    m_speedSamples.clear();
+}