observe how many observables you have created

[dominictarr]

So, I was wondering about performance stuff, and I made a script to count how many of which types of observables were being created.
How better to observe observables than with an observable?

to use this, do

MUTANTS = require('mutants/debug')

at the top of your program. Then you can access the MUTANTS global in the dev tools.
You could also render it in html and get a live updating view of the most used observables.

Putting this here for discussion more than a serious PR, still need to play with this a bit to see if it's useful.

[mixmix]

this looks like a pretty interesting idea