Code Sample aem-authoring-extension-assetfinder-flickr where can I find it?

Hm I have installed the extension and it seems to be working but is there maybe some more documentation available somewhere?

The biggest questions I have how the code "hooks" into AEM?

I am guessing this works mostly via the assetfinder.flickr.dnd.js code? 
I have to say this JS code is a bit over my head, but thats something I am sure I can figure out.

What I am not sure about this how does AEM know to run this JS code in assetfinder.flickr.dnd.js and assetfinder.flickr.js I am guessing that is Serverside code?
(I cannot imagine this running on the client)

FYI:

To build this code the version number of

<groupId>com.day.jcr.vault</groupId>
<artifactId>content-package-maven-plugin</artifactId>

has to be changed to 0.0.24

so like this:

<groupId>com.day.jcr.vault</groupId>
                <artifactId>content-package-maven-plugin</artifactId>
                <version>0.0.24</version>
                <extensions>true</extensions>

When I try to drag assets from flickr to ootb image component it doesn't work. There is a separate component built to drag the images, How can we use OOTB (image, imagetext) to drag images from flickr directly