Remove remaining users of wl_range

[SirVer]

I gave up on the remaining wl_const_range() for now. They are all used in the same manner and should still be removed. Basically there is a loop over a container which appends something to a string, but only for all elements but the last. E.g. for {"a", "b", "c"} it would do:

s = s + "a";
s = s + ", ";
s = s + "b";
s = s + ", ";
s = s + "c";

The better approach here is to use boost::algorithm::join() for this use case. It is more efficient and it will make that code easier to read. I think this should be done in a separate branch though and I am all for merging this one ASAP.

[GunChleoc (gunchleoc)]

Code example: http://bazaar.launchpad.net/~widelands-dev/widelands/bug-1203629/revision/7156

[GunChleoc (gunchleoc)]

Fixed in build19-rc1.