Deletion + Optimization

Deletion now works!

Plus I optimized the code a bit more. It does still slow down when the whole map is filled with towers ( < 1 second lag for connecting newly created nodes together and working through the dijkstra algorithm). However, it's much faster than before.

I'm really glad I got this done over the weekend, was almost tearing my hair out trying to get everything to work and make it more optimized. The code base is a bit clustered at the moment, but i'm just focusing on functionality for now.

Maybe we'll start seeing some enemy movement in the next update!

-eragnarok