switched up some pointers to shared, added some more rendering example

src/engine/input/sdlinputprocessor.cpp

@@ -290,6 +290,5 @@ InputProcessorKeycode SdlInputProcessor::get_keycode(SDL_Keycode keycode) {
     if(this->keycode_map.find(keycode) == this->keycode_map.end()) {
         return KEY_UNKNOWN;
     }
-    printf("Detected keypress for %i\n", this->keycode_map[keycode]);
     return this->keycode_map[keycode];
 }