Changelog

• Fix not being able to resize detached blob (created from dataUrl or binary string) that was added via uploader.addFile().
• Consider HTTP status below 200 an error as well (mostly because when connection breaks, HTTP status might be reported as 0).
• Do not set inner global xhr var to null onloadend of any single instance (which caused random errors during the upload).
• Expose whole moxie namespace under plupload.moxie (mostly for smooth integration into environments like Webpack).
• Add new filter prevent_empty, which filters out empty files by default, but can be turned off if required.
• Update Russian, Latvian and German language packs.
• Update mOxie to: v1.5.6.