Pending 4.15.1 release

[TimSchofield]

The release is nearly done, I hit merge conflicts on many of the language (.mo and .po) files late last night, that I'll try to resolve tomorrow.

Paul, these conflicts worry me they shouldn't be happening. Rafael updated the translation files just a short time ago. I think this is a consequence of what I mentioned before about him using slightly different commands to create the files now. I just worry you are bout to overwrite his work.

Tim