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

instructions.

src/SeerStackManagerWidget.cpp

@@ -0,0 +1,55 @@
+#include "SeerStackManagerWidget.h"
+#include <QtWidgets/QToolButton>
+#include <QtGui/QIcon>
+#include <QtCore/QDebug>
+
+SeerStackManagerWidget::SeerStackManagerWidget (QWidget* parent) : QWidget(parent) {
+
+    // Initialize private data
+
+    // Setup UI
+    setupUi(this);
+
+    // Setup the widgets
+    tabWidget->setMovable(true);
+    tabWidget->setTabsClosable(false);
+
+    _stackFramesBrowserWidget    = new SeerStackFramesBrowserWidget(this);
+    _stackArgumentsBrowserWidget = new SeerStackArgumentsBrowserWidget(this);
+    _stackLocalsBrowserWidget    = new SeerStackLocalsBrowserWidget(this);
+
+    tabWidget->addTab(_stackFramesBrowserWidget,    "Frames");
+    tabWidget->addTab(_stackArgumentsBrowserWidget, "Arguments");
+    tabWidget->addTab(_stackLocalsBrowserWidget,    "Locals");
+
+    QToolButton* refreshToolButton = new QToolButton(tabWidget);
+    refreshToolButton->setIcon(QIcon::fromTheme("view-refresh"));
+    refreshToolButton->setToolTip("Refresh the stack information.");
+    tabWidget->setCornerWidget(refreshToolButton, Qt::TopRightCorner);
+
+    // Connect things.
+    QObject::connect(refreshToolButton,         &QToolButton::clicked,                          this,                      &SeerStackManagerWidget::handleRefreshToolButtonClicked);
+}
+
+SeerStackManagerWidget::~SeerStackManagerWidget () {
+}
+
+SeerStackFramesBrowserWidget* SeerStackManagerWidget::stackFramesBrowserWidget () {
+    return _stackFramesBrowserWidget;
+}
+
+SeerStackArgumentsBrowserWidget* SeerStackManagerWidget::stackArgumentsBrowserWidget () {
+    return _stackArgumentsBrowserWidget;
+}
+
+SeerStackLocalsBrowserWidget* SeerStackManagerWidget::stackLocalsBrowserWidget () {
+    return _stackLocalsBrowserWidget;
+}
+
+void SeerStackManagerWidget::handleRefreshToolButtonClicked () {
+
+    stackFramesBrowserWidget()->refresh();
+    stackArgumentsBrowserWidget()->refresh();
+    stackLocalsBrowserWidget()->refresh();
+}
+