Use Mozilla's colors for itembox and tagbox background
This way, the colors play nicely with Windows themes (e.g. high contrast)
Re https://forums.zotero.org/discussion/38870/make-zotero-fully-recognize-windowsff-high-contrast-themes/ and https://twitter.com/stuffilike2know/status/504167872567189504
Small fix to copyObject
Update submodules, repotime, versions
Update citeproc-js to 1.0.539
test for presence of author's firstName before using it
Don't unwrap objects passed to chrome

Unwrapping objects also waives the Xray wrappers for contained objects,
which we need.
Fix MODS under Fx 32
Fix DataCite under Fx 32
fix indenting
Merge pull request #536 from adam3smith/coinsfix

test for presence of author's firstName before using it
Fix == use
Merge pull request #531 from aurimasv/high-contrast

Use Mozilla's colors for itembox and tagbox background
Merge branch '4.0'

Conflicts:
	chrome/content/zotero/xpcom/zotero.js
	install.rdf
	update.rdf