jqnpm fetch
Test fetching a single dependency
Also fetch from remote when doing jqnpm install
Break out fetching/installing a single package
Normalize variable names, remove unnecessary file check, simplify package debugging
Replace HOME with tilde in some debug strings
Simplify requiring jq.json in a function
Allow fetching and installing packages without jq.json, create jq.json if necessary, add/update dependency entries
Tests for manually fetching/installing a single dependency while not having a jq.json file present