Atelier project hidden files. What should I commit?

Hi!

In every Atelier project you can find following hidden files:

.buildpath

.version

.connection

.project.

Should I include all of them into commit?

I understand that .project is mandatory. But what about the rest? Is there any general rule?

F.e. if we work in team and everybody has their own connection on locale machine .connection should not be included. Yes?