Currently translated at 27.6% (245 of 887 strings)

This is a merger of two commits.

Currently translated at 28.7% (249 of 865 strings)

Currently translated at 30.1% (237 of 787 strings)

After this, it should hopefully not record line numbers anymore,
so the diffs of updatepo.sh runs are smaller. Well, this is theory,
lets see how it will turn out to be in practice.

This reverts commit e4e4324a.

Conflicts:
	po/minetest.pot
	po/*/minetest.po