Adds Aerolab tab

This patch adds Aerolab, a virtual elevation module.  A
new tab is added in which the user can perform virtual
elevation analysis.  This version is a manual Aerolab,
where user can use the following sliders to elevation-match
to a known elevation profile:
Crr  -coefficient of rolling resistance
CdA  -aero coefficient of drag * frontal area
Eta  -drivetrain efficiency (to be used when using a crank-
      or bottom-brack-based power meter)
Mass -total mass of bike + rider
Rho  -density of air
E_offset -an elevation offset to align elevations

src/MainWindow.cpp

@@ -17,6 +17,8 @@
  */
 
 #include "MainWindow.h"
+#include "AerolabWindow.h"
+#include "Aerolab.h"
 #include "AllPlotWindow.h"
 #include "AllPlot.h"
 #include "BestIntervalDialog.h"
@@ -292,6 +294,13 @@ MainWindow::MainWindow(const QDir &home) :
     performanceManagerWindow = new PerformanceManagerWindow(this);
     tabWidget->addTab(performanceManagerWindow, tr("Performance Manager"));
 
+
+    ///////////////////////////// Aerolab //////////////////////////////////
+
+    aerolabWindow = new AerolabWindow(this);
+    tabWidget->addTab(aerolabWindow, tr("Aerolab"));
+
+
     ////////////////////////////// Signals ////////////////////////////// 
 
     connect(calendar, SIGNAL(clicked(const QDate &)),