Resolves #343 GUI and Frame Refactor

Major rewrite of the GUI into a module and view form, also using a new Feed class. The frame and frameset data structures have also been rewritten to support memory pooling and response frames.

applications/gui2/src/views/statistics.cpp

@@ -84,6 +84,7 @@ void StatisticsWidget::draw(NVGcontext *ctx) {
 					else nvgFontFace(ctx, "sans-bold");
 					nvgFillColor(ctx, nanogui::Color(8, 8, 8, 255)); // shadow
 					tw = nvgTextBounds(ctx, pos[0] + width(), rowh, msg.c_str(), nullptr, nullptr);
+					nvgText(ctx, pos[0] + width(), rowh, msg.c_str(), nullptr);
 					nvgFillColor(ctx, colour);
 					nvgText(ctx, pos[0] + width() - 1, rowh - 1, msg.c_str(), nullptr);
 					tw += 10;