Show and Hide classes using the media-query variable map

[Sebastian Nitu]

Just thought I could probably create an automatic class creation mixin for adding show/hide classes for each of the break points in $breakpoints variable map. This would take the key and use it as the class for when something would be shown or hidden:

// Hide only in this breakpoint
.hide-small { }
// Show only in this breakpoint
.show-small { }