Bower install from URL gives blank folder

Question

I'm using bower (v. 1.3.5) to pull in my Front-End JS dependencies, and I want to depend on this: https://github.com/dcneiner/Downloadify

It doesn't have its own bower.json so I'm referencing by URL in MY bower.json:

  "dependencies": {
    "jspdf": "~1.0.272",
    "downloadify": "https://github.com/dcneiner/Downloadify.git"
  }

But all I get is the named folder containing only a .bower.json file, but none of the code or anything else in the GH repo.

Running bower install directly on the cmd line gave (once I'd cleared out the bower cache):

E:/My/Path>bower install https://github.com/dcneiner/Downloadify.git
bower Downloadify#*        not-cached https://github.com/dcneiner/Downloadify.git#*
bower Downloadify#*        resolve https://github.com/dcneiner/Downloadify.git#*
bower Downloadify#*        checkout 0.2.1
bower Downloadify#*        resolved https://github.com/dcneiner/Downloadify.git#0.2.1
bower Downloadify#~0.2.1   install Downloadify#0.2.1

I previously did the same thing with jQuery.fileDownload which worked perfectly, so I don't think it's anything I've done to my machine?

QUESTION:

• Have I done something wrong?
• Has Downloadify been set up wrong?
• Or is it an inexplicable mystery?

In either of the first 2 cases, what is the problem and how do I fix it?

NOTE: Currently I'm working around it by having downloaded the source code manually and having it hard-coded into my project.