Performance improvements by inlining functions

[rasmusgo]

I was able to get big performance improvements by inlining most functions in the generated code. The overall speed boost for my application was around 2x.

My changes to the generated code can be seen here: https://github.com/rasmusgo/physics_playground/commits/geometric-algebra/geometric_algebra

Consider this code as contributed if anything can be copied from the geometric_algebra folder.