another commit on the entity subject. I am using my own item to spawn
personas (coz eggs only spawn entityliving), but the threading and lwjgl
problem is still unresolved. It seemed that guava's cache doesn't have
an ability to lock to main thread where lwjgl has created its context.
Thus, the loading of the model succeeded, but not creating the VBOs and
VAOs. I have to figure out a way to do that. Worst case scenario would
be that I have to load things in main thread without using cache, but
that would impose huge problems if personas gets bigger.