[Users] Code freeze

Hi,

The Einstein Toolkit [1] prepares for a new release this week, and in the process all repositories which are part of the ET are from now on frozen. That means nobody should commit any change anymore, unless it a) fixes an important bug _and_ b) is approved by myself. This is not enforced technically, but don't abuse it.

The freeze won't last for long. The current plan is:

Mon Apr 18th: freeze Wed Apr 20th: release-branches created Thu Apr 21th: new release, thaw

The new release will be announced here, as well as any changes to this plan.

Frank

[1] http://einsteintoolkit.org/