The Return of Dynamic Features + Naval

I've added new sounds for most of the naval content of course, but the biggest thing in this update is the return of some (not all) of the dynamic features. Namely, I was able to get the artillery deafening and tinnitus to work. Footsteps are another matter, and as of now might be too janky to leave in. We'll give it an update or two to find out. 

As always, feel free to contact me directly to report issues. There are a couple things I'm not happy with which will likely be tackled this Christmas. 

As for the heavy truck, the reason it doesn't have any sound is because I've got plans for it that involve recording sounds myself, which I won't be able to do until I'm back home for the holidays. Stay tuned.

(And sorry for the release delay. I've been exceptionally busy with work and engineering courses, so finding time to get everything tested on the dev-branch didn't pan out.)