Re: Create \temporary for doing overrides without pop-first set (issue 6687044)

[janek . lilypond]

There was some controversy with this patch, but it was counted down and
noone found anything wrong with the actual code.  Some people are not
sure whether we want to have \temporary or something else, but they can
change it in the future if they want.  For now, this patch adds
something that is missing and allows to fix some bugs, so i'm going to
push it on Tuesday or so; there's no point in wasting David's work.

cheers,
janek

http://codereview.appspot.com/6687044/