Grunt: add glsl-optimizer

[parasyte]

https://github.com/aras-p/glsl-optimizer

This is a neat little tool that will come in handy for #591. I will be doing some shader work, and it would be nice to invest in glsl-optimizer to get the most out of the GPU.

I don't know how much more the GLSL will be optimized, since it will already be close to optimal. But it's worth a shot.

[agmcleod]

How can we integrate that with grunt exactly? Since it's using platform dependent binaries?

[agmcleod]

Err build systems, not binaries :)

[parasyte]

npm builds it when installed... It currently has compilation errors on OSX in both the npm registry and git repository, but that's really just status quo when dealing with C++ and portability!

[parasyte]

I made https://github.com/parasyte/grunt-glsl-optimizer But it isn't quite as useful as it seems. Writing GLSL by hand with a template engine is better for us.