What do you think about backporting the new building and wonder icons,
as well as the hex2t tileset to 2.1?
These are all trivial non-code improvements that'll produce a
noticeable visual upgrade to the default tileset. In addition, they --
especially the building icons -- have been in the making for so long,
that it IMHO doesn't make sense to postpone their release until 2.2.
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