Don't double-encode extended characters in relative paths

Fixes #287
Update locales from Transifex
Fix ⏎ characters in es-ES, fr-FR, and ja-JP
Fix "this._deferred is null" WebDAV sync error

This occurred if an attachment had only files beginning with periods.
fr-FR: Redo "Champs & Marqueurs" change
Fix a few more potential file sync errors
Update styles and translators
Update about screen
Set about.tmpl to 4.0
Add end() to end of Q chain
Remove remaining ENS style code
Recognize container-title-short as journal abbreviation
Fix formatting for copy-pasted bibliographies
done(), not end()
Support file:/// URIs in Zotero.HTTP.promise()
Properly install styles with BOMs from disk
Avoid deprecation warning
Add link to bug on document.evaluate deprecation warnings
Update to citeproc-js 1.0.446
Fix automatic title abbreviation on new installs