Lots of languages really need the <plurals> tags to make sense, so
this also makes lint exit with an error when it finds strings that
should be <plurals>
closes#883
Now that we've moved the first screen to "Latest", we always want to do
our best to show something there. This preference is pretty redundant in
light of this.
Left some more unused strings which are a bit more general purpose and
perhaps should wait until after a stable release to remove. The
rationale for this is that we may want to revert to part of the old
terminology in certain places, and don't want to have to ask everyone to
translate everything again.
