WIP: Feature/jk dev

• Remove unused and unnecessary passthroughs in viewer shaders
• Remove no longer required arguments from pipeline shader helpers
• Add (internally unused) virtual performImgui method to viewer renderables
• Snap camera on viewer startup
• Add sphere rendering mode to viewer (WIP)
• Rename Camera to SmoothedCamera
• Fix initialization order issues in GlfwApp
• Add window size caching to GlfwApp (Window size and position are persistent across restarts)

camera/glow-extras/camera/controllers/LookAroundController.cc

@@ -2,7 +2,7 @@
 
 #include <GLFW/glfw3.h>
 
-void glow::camera::LookAroundController::update(float, const glow::input::InputState& input, glow::camera::Camera& camera) const
+void glow::camera::LookAroundController::update(float, const glow::input::InputState& input, glow::camera::SmoothedCamera& camera) const
 {
     if (input.isMouseButtonDown(GLFW_MOUSE_BUTTON_RIGHT))
     {