Add flexbox classes to Bootstrap
- .flex
- .flex-xs
- .flex-sm
- .flex-md
- .flex-lg
- .flex-wrap
- .flex-xs-wrap
- .flex-sm-wrap
- .flex-md-wrap
- .flex-lg-wrap
- .justify-space-between
- .justify-xs-space-between
- .justify-sm-space-between
- .justify-md-space-between
- .justify-lg-space-between
- .justify-flex-end
- .justify-xs-flex-end
- .justify-sm-flex-end
- .justify-md-flex-end
- .justify-lg-flex-end
- .flex-grow-fill
- .flex-grow-xs-fill
- .flex-grow-sm-fill
- .flex-grow-md-fill
- .flex-grow-lg-fill
- .flex-horizontal-centered
- .flex-vertical-centered
- .flex-centered
- .flex-xs-horizontal-centered
- .flex-xs-vertical-centered
- .flex-xs-centered
- .flex-sm-horizontal-centered
- .flex-sm-vertical-centered
- .flex-sm-centered
- .flex-md-horizontal-centered
- .flex-md-vertical-centered
- .flex-md-centered
- .flex-lg-horizontal-centered
- .flex-lg-vertical-centered
- .flex-lg-centered
- .no-flex-xs-block
- .no-flex-sm-block
- .no-flex-md-block
- .no-flex-lg-block
- .no-flex-xs-inline-block
- .no-flex-sm-inline-block
- .no-flex-md-inline-block
- .no-flex-lg-inline-block
On the next release:
- flex-direction
- no-shrink