Loads package.json from the given directory (walking up to find it). Requires directories.i18n and directories.l10n.
Directory to start from (e.g. process.cwd())
Parsed package.json with directories.i18n and directories.l10n
Error if package.json not found or missing directories.i18n / directories.l10n
Loads package.json from the given directory (walking up to find it). Requires directories.i18n and directories.l10n.