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

instructions.

src/SeerSourceLibraryManagerWidget.cpp

@@ -0,0 +1,48 @@
+#include "SeerSourceLibraryManagerWidget.h"
+#include <QtWidgets/QToolButton>
+#include <QtGui/QIcon>
+#include <QtCore/QDebug>
+
+SeerSourceLibraryManagerWidget::SeerSourceLibraryManagerWidget (QWidget* parent) : QWidget(parent) {
+
+    // Initialize private data
+
+    // Setup UI
+    setupUi(this);
+
+    // Setup the widgets
+    tabWidget->setMovable(true);
+    tabWidget->setTabsClosable(false);
+
+    _sourceBrowserWidget        = new SeerSourceBrowserWidget(this);
+    _sharedLibraryBrowserWidget = new SeerSharedLibraryBrowserWidget(this);
+
+    tabWidget->addTab(_sourceBrowserWidget,        "Source");
+    tabWidget->addTab(_sharedLibraryBrowserWidget, "Libraries");
+
+    QToolButton* refreshToolButton = new QToolButton(tabWidget);
+    refreshToolButton->setIcon(QIcon::fromTheme("view-refresh"));
+    refreshToolButton->setToolTip("Refresh the source/libraries information.");
+    tabWidget->setCornerWidget(refreshToolButton, Qt::TopRightCorner);
+
+    // Connect things.
+    QObject::connect(refreshToolButton, &QToolButton::clicked,     this,  &SeerSourceLibraryManagerWidget::handleRefreshToolButtonClicked);
+}
+
+SeerSourceLibraryManagerWidget::~SeerSourceLibraryManagerWidget () {
+}
+
+SeerSourceBrowserWidget* SeerSourceLibraryManagerWidget::sourceBrowserWidget () {
+    return _sourceBrowserWidget;
+}
+
+SeerSharedLibraryBrowserWidget* SeerSourceLibraryManagerWidget::sharedLibraryBrowserWidget () {
+    return _sharedLibraryBrowserWidget;
+}
+
+void SeerSourceLibraryManagerWidget::handleRefreshToolButtonClicked () {
+
+    sourceBrowserWidget()->refresh();
+    sharedLibraryBrowserWidget()->refresh();
+}
+