Reduce scripting lang to usage for maps - not general logic

[hogsy]

After some research and a bit of time pondering, I think I've settled on keeping the game-logic confined to an implementation in C/C++.

For maps, as we extend the format, we can introduce support for triggering events which can execute through a script - this on its own will introduce a lot of flexibility for scenarios.

[hogsy]

Don't really need to do anything for this one, was more of a mental note.

https://trello.com/c/tWlEkday/8-scriptable-events-within-levels-via-javascript-maybe-provides-outline-for-things-like-loading-screen-etc-too