Remove OS images from git history

[ottopasuuna]

We used to keep some operating system images in this repo, but although they are not currently in the repo, they remain in the history, resulting in long download/clone times. I haven't checked, but it may be possible to remove these files throughout the entire history of the project.

[ottopasuuna]

Haven't looked too closely yet, but this might do the trick: http://www.catb.org/esr/reposurgeon/

[jpas]

BFG Repo-Cleaner is also another tool that could potentially be used

Here is a list of all files in the repository sorted by decreasing file size.