identify: rename 'changed' keyword -> 'dirty'
I meant to do this before sending the initial templater support, but forgot.
I'm quite surprised that 'dirty' doesn't occur in more user facing contexts, but
there are a few, like the help for blackbox. It also more obviously mirrors the
'(clean)' state printed by the summary command. I also didn't like that it was
just one letter off from {changes} in the {latesttags} sub-keywords, which has a
totally different meaning.
lib - sys sys
mercurial - sys sys
hgrc.d - sys sys
9diff.rc - sys sys
factotum.rc - sys sys
rc - sys sys
bin - sys sys
9diff - sys sys
hg - sys sys
sys - sys sys
lib - sys sys
python - sys sys
lib - sys sys
python2.5 - sys sys
site-packages - sys sys
hgext - sys sys
+ - sys sys
mercurial - sys sys
+ - sys sys
mercurial-VERSION-py2.5.egg-info - sys sys
src - sys sys
cmd - sys sys
hg - sys sys
+ - sys sys