main: release 0.14.0

[aykevl]

Perhaps some extra PRs need to be merged before actually merging this (and making the release) but I've already done some of the time consuming part here.

[deadprogram]

We should add the couple of PRs that made it into dev in the last couple of days to the changelog.

[aykevl]

I have updated this PR to reflect the latest changes in the dev branch. I think this release is now ready.

[deadprogram]

Incredible work from everyone on this release! Now merging.

[deadprogram]

So I think to complete this release, we now need to do the following:

git checkout dev
git pull --rebase origin dev
git checkout master
git rebase dev
git branch -m master release
git push -u origin release

Once that is done, then we change the settings in the Github web interface to use release as the default branch *Settings > Branches > Default branch" and that should be it.

I have done this procedure already on GoCV repo for the most recent release there.

[aykevl]

I have created the release branch and pushed it, but for some strange reason I can't push the master branch 🤔 but that shouldn't be a problem.
I have set the release branch as the default branch.