Compile a fast build using closure compiler

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One of the ways to speed up slick is to reduce function calls by inlining all the functions.

However, keeping the code readable and maintainable is a much higher priority than speed and we can't sacrifice that.

Google closure has an advanced setting that inlines functions. This may primarily be to reduce file size, but it may also be intended to speed up the code as well.

Let's try this out and see if we can squeeze out a bit more speed.

If this works we can go through all the code and move more things into separate functions to make the code even more readable. This won't effect the speed because the fast compiled build will inline all those functions.