Introduced shortcut clearfix mixins, so that clearfixing from media queries becomes possible without using the inconvenient main mixin

[lolmaus]

Sometimes it's necessary to apply clearfixes from inside media queries. But currently Toolkit offers handy clearfix shortcuts only in a form of extendables, and SASS does not allow extending from media queries.

Using the main mixin is kinda burdensome due to the fact that a never used argument goes first and you have to either provide the first argument (@include clearfix(false, 'micro');) or provide the name for the second argument (@include clearfix($direct: 'micro');).

So i added a shorthand mixin for every clearfix flavor. Now it's possible to do simply @include clearfix-micro; without any arguments and even parentheses.

It gets even better in SASS syntax:

.region
  @extend %clearfix-micro

.block
  @media (min-width: 400px)
    +clearfix-micro

PS I think that SASS should allow extending from media queries by simply declaring extendable classes inside CSS media queries. I don't see why that's impossible. Are you with me?