A few bug fixes and improvements#7

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hugogrochau wants to merge 8 commits intoeverett1992:masterfrom

hugogrochau:master

Commits on Jan 16, 2017

Use canonical path for wallpapers and remove sample files on deletion
hugogrochau
committed

Commits on Apr 13, 2017

Add wp next as an alias to `wp change`
hugogrochau
committed