MEAN.io and Flow.js: How to register dependancy and integrate?

So I'm new to the MEAN stack and while I quite enjoy working on it I find myself usually wasting several hours searching for a solution as to why my angular suddenly breaks or why a dependency isn't being registered.

I used both bower and npm to install flow.js, and I modified the assets.json file in the conf folder to include the minified version of flow.js from the bower folder.

I tried including the flow dependency in my package's app.js file, but I get an error:

Error: dependency 'flow' was not registered at get (pathOfProject\node_modules\dependable\index.js:115:15)

The main problem is that I really have no idea how to register dependencies and what are the things I need to do to actually get something to see something else. Part of the problem is that I'm not yet comfortable with the DI system as well, though I'm trying hard to learn and understand it.

So the question is: I have my flow.js, I have my mean.io project, and how would I go about setting up so that I can use $flow in my controllers scope?