Add preliminaries for signal viewer, update version number, switch dbc handler to singleton pattern, changes to DBC attributes

signalviewerwindow.cpp

@@ -0,0 +1,18 @@
+#include "signalviewerwindow.h"
+#include "ui_signalviewerwindow.h"
+
+SignalViewerWindow::SignalViewerWindow(QWidget *parent) :
+    QDialog(parent),
+    ui(new Ui::SignalViewerWindow)
+{
+    ui->setupUi(this);
+
+    QStringList headers;
+    headers << "Signal" << "Value";
+    ui->tableViewer->setHorizontalHeaderLabels(headers);
+}
+
+SignalViewerWindow::~SignalViewerWindow()
+{
+    delete ui;
+}