feat(post): new post “Upgrade Guide: v1.1.0”

_app/_posts/news/2017-01-07-upgrade-guide-v1.1.0.md

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+---
+layout: post
+title: "Upgrade Guide: v1.1.0"
+category: news
+---
+
+There're some significant changes in update v1.1.0, action required after you upgrade Almace Scaffolding.
+
+In your front-matter fields:
+
+- Replace all `svg-headline`, `img-headline` with `heading-img`.
+- Replace all `svg-headline-width`, `img-headline-width` with `heading-img-width`.
+- Remove all `svg-headline-height`, `img-headline-height` as they're deprecated and no longer available.
+- Add `heading-img-local: true` if images are stored right inside your project.
+
+Check the following front-matter data for post thumbnails:
+
+- Replace all `thumb` with `thumbnail`.
+- Add `thumb/` prefix to your filename, ie. `thumbnail: thumb/my-post.png`.
+- Add `thumbnail-local: true` if thumbnails are stored right inside your project.