what does 'dev' mean in the version number?

Issue Summary

Hi,
I'm working on implementing cocomment integration into my site:

http://stage.deas.harvard.edu:8260/

This site previously used the original cocomment module, which I guess comes with the core package of Drupal, but it was not collecting all of the comments posted on the blogs. So I wanted to upgrade with one of the new modules, and I wondered if the 'dev' in the version number meant that the module was still under development?

I did download the version labeled HEAD, which I understand to be like a fundamental working version of the module, but it did not provide better tracking of comments.

So my question is if there is anything else I can do to improve coComment? Maybe I didn't install the coComment module correctly.
If it would help to see the problem better, please take a look at the site and try to track with coComment?
thank you