Hover interactions should work with background-color too.
Merge branch 'hover-fixes'
Alias image-replace with ir
Merge branch 'ir-code-duplication'
Added a force-use-color parameter for the hover-* methods so you can for the changing of the text color if a background was also set.
Merge branch 'force-use-color'

Conflicts:
	roots-css/interaction.styl