Ensure timing code is uniformly high quality across the tools

[tomjaguarpaw]

[tomjaguarpaw]

Each language should probably have timing code shared between all implementations.

[awf]

This is pretty much done?

[msdmkats]

Depends on how you define "done" in this context. I'd say this is done when all benchmarks are run on the new architecture, and the "tools" folder does not exist anymore. This is not the case yet: the "tools" folder still contains benchmarks for Autograd, Julia ForwardDiff, Adept, ADiMat, ADOLC, Ceres, MuPad, and Theano. The first two even participate in the weekly runs.