feat($scaling): don't try to scale non-renderable files/image #1061
feat($scaling): fix unit tests #1061
chore($previews): add tiffPreviews supportedFeatures flag
feat($scaling): respect requested output type #1061
feat($scaling): allow quality to be specified for all scaled versions (not per-image) #1061

Note that this is only relevant if the ouput type is image/jpeg.
feat($scaling): handle scaled image generation failures #1061
feat($scaling): allow original images to be ignored (not uploaded) #1061
chore($scaling): remove logging statement #1061
test(unit/scaling.js): remove IE11 hack after working around img onload browser bug #1061
fix(third-party/megapix-image.js): img dimensions may not be available immediately after onload in IE11 #1061
feat($scaling): optionally hide all scaled files in the UI #1061

- Fine Uploader UI-only option.
- Fixed an issue where the spinner didn't appear next to an original file while waiting for scaled images to be generated.
docs(features/session.jmd): typo

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docs(features/session.jmd): typo

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docs($scaling): options #1061
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docs($scaling): feature page #1061
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docs(features/scaling.jmd): typos #1061
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test(unit/scaling.js): validation test closes #1061
feat($scaling): API method #1061

Also changed `max` property to `size`.
docs(features/scaling.jmd): mention methods/options in feature doc #1061
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docs(api/methods.jmd): fix syntax error #1061
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