To be fully responsive, we can basically never specify the width of
our container in a fixed number of pixels; otherwise we'll run into
the situation where there's an inordinate amount of wasted space on
our left and right.
So everything needs to change from, e.g. row to row-fluid,
and that has a whole cascading series of changes that that implies.
(imported from commit 7e2771d916f429548c65c0a00fc4c11397054656)
This makes it possible to point users back at the instructions they
followed originally in the event that their Zephyr mirroring bot has
died.
(imported from commit 24ab2dc0df3dc88f8155d58761a89fe44c111fd9)