Hookalyzer

Hookalyzer inspects hook invocations, recording data about them as they fly by. Most interestingly, it keeps track of how datastructures change as they pass through each step of an alter.

See the README for the most updated info.

For now, just enable the module, and it'll start blowing chunks all over the bottom of your HTML output.

Note that the real work here is in the multilevel branch, and is unfortunately stalled. See #2403495: CPU performance issues in diff iterator for why.