Heapster tutorial's build instructions are broken

[scuellar]

Probably after commit d2d9f01ce960209838f02af27a75d2d628e4094b the heapster build needs more specific instructions on building coq.

Specifically, it requires a particular version of EnTree.

[RyanGlScott]

My bad, I forgot to update the tutorial when writing #1778. It should just be a matter of this part of the saw-core-coq README:

saw-script/saw-core-coq/README.md

Lines 24 to 35 in 9acd534

	The recommended way to install Coq and these dependencies is using opam. This
	can be done with the following steps, which will not only install opam, Coq, and
	the above mentioned Coq libraries, but will make sure to install the proper
	version of Coq needed for those libraries:
	```
	sh <(curl -sL https://raw.githubusercontent.com/ocaml/opam/master/shell/install.sh)
	opam init
	opam repo add coq-released https://coq.inria.fr/opam/released
	opam install -y coq-bits
	opam pin -y entree-specs https://github.com/GaloisInc/entree-specs.git#52c4868f1f65c7ce74e90000214de27e23ba98fb
	```

[scuellar]

Actually, I now realized the tutorial is fine. It points to that README correctly, I just had the wrong version of 'entree-specs'.

I'm closing this issue.