Move source into a 'src' directory. Update README.md file for build

instructions.

src/SeerThreadManagerWidget.cpp

@@ -0,0 +1,48 @@
+#include "SeerThreadManagerWidget.h"
+#include <QtWidgets/QToolButton>
+#include <QtGui/QIcon>
+#include <QtCore/QDebug>
+
+SeerThreadManagerWidget::SeerThreadManagerWidget (QWidget* parent) : QWidget(parent) {
+
+    // Initialize private data
+
+    // Setup UI
+    setupUi(this);
+
+    // Setup the widgets
+    tabWidget->setMovable(true);
+    tabWidget->setTabsClosable(false);
+
+    _threadIdsBrowserWidget    = new SeerThreadIdsBrowserWidget(this);
+    _threadFramesBrowserWidget = new SeerThreadFramesBrowserWidget(this);
+
+    tabWidget->addTab(_threadIdsBrowserWidget, "Ids");
+    tabWidget->addTab(_threadFramesBrowserWidget, "Frames");
+
+    QToolButton* refreshToolButton = new QToolButton(tabWidget);
+    refreshToolButton->setIcon(QIcon::fromTheme("view-refresh"));
+    refreshToolButton->setToolTip("Refresh the thread information.");
+    tabWidget->setCornerWidget(refreshToolButton, Qt::TopRightCorner);
+
+    // Connect things.
+    QObject::connect(refreshToolButton, &QToolButton::clicked,     this,  &SeerThreadManagerWidget::handleRefreshToolButtonClicked);
+}
+
+SeerThreadManagerWidget::~SeerThreadManagerWidget () {
+}
+
+SeerThreadIdsBrowserWidget* SeerThreadManagerWidget::threadIdsBrowserWidget () {
+    return _threadIdsBrowserWidget;
+}
+
+SeerThreadFramesBrowserWidget* SeerThreadManagerWidget::threadFramesBrowserWidget () {
+    return _threadFramesBrowserWidget;
+}
+
+void SeerThreadManagerWidget::handleRefreshToolButtonClicked () {
+
+    threadIdsBrowserWidget()->refresh();
+    threadFramesBrowserWidget()->refresh();
+}
+