add zarith_stubs_js
This package is needed for the JS effort.
It adds the package zarith_stubs_js and fix a small problem with the use of nvm
This MR supersedes !161 (closed) that referred to the wrong git branch.
Edited by pietro
This package is needed for the JS effort.
It adds the package zarith_stubs_js and fix a small problem with the use of nvm
This MR supersedes !161 (closed) that referred to the wrong git branch.