magit-item-highlight: leave :bold unset

Explicitly setting `magit-item-highlight' to nil was only necessary for
the short period during which magit highlighted the current section by
making it bold.  Since that no longer is the case the only effect of
explicitly setting the highlighted section to being not-bold is that
parts of a section loose their boldness when it is current.
Merge pull request #164 from tarsius/master

magit-item-highlight: leave :bold unset
Add company-mode faces.
Merge pull request #165 from proofit404/master

Add company-mode faces.
fix magit faces

This doesn't theme magit more completely, it just fixes shortcomings
in what others have already done.
Theme diff-hl
Merge branch 'master' of github.com:bbatsov/zenburn-emacs
Merge pull request #166 from tarsius/fix-magit

fix magit faces
Refine diff-hl's faces
Merge branch 'master' of github.com:bbatsov/zenburn-emacs
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