KDE Kirigami 1.1 UI Framework Released
KDE Kirigami 1.1 features various user interface design changes, some more standardizing/unifying, and Ctrl+Q is now considered the default shortcut to close Kirigami applications. Plus there's other polishing and fixes.
With KDE Plasma 5.8, Discover will be shipping a new version based on Kirigami and this will mean distributions should begin rolling out Kirigami packages soon.
More details on the Kirigami 1.1 user-interface framework via this KDE.org announcement.