`link` stanza has been removed as it does not serve normal usage of
node-webkit.
node-webkit is a runtime targeted by application developers.
Usage of node-webkit usually takes one of two forms:
- launching the binary with development code as argument, either by
CLI or drag-and-drop.
- bundling a copy of the binary with release code, for packaging and
distribution.
Neither usage is aided by a symlink; a known binary location, which
Cask provides, is sufficient.
Addendum: `version` value is reused in `url` stanza to facilitate
future updates.
ndr