Add missing deps, steps and info about nodejs installation.
Rename remove_from_basket_task to unsubscribe_from_basket_task.
[Fix bug 1045556] Update vouched mozillians in basket.
Merge pull request #1106 from johngian/pr-1096

Add missing deps, steps and info about nodejs installation.
Merge pull request #1103 from johngian/1045556-unvouch-basket

[Fix bug 1045556] Update vouched mozillians in basket.