Default URL value is added to defaults/preferences/zotero.js
Data server URL is added to preferences.xul (GUI)
Now data server URL is taken from preferences in sync.js.
Extension unpacking issue is fixed.
Build extension
Update version
Fix Bug not being able to set attachmentBasePath.
Ignore file.fileSize error when calculating upload file size
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
Merge remote-tracking branch 'upstream/4.0' into 4.0