New position utils, split docs

- Renames .pos-f-t to .fixed-top, adds .fixed-bottom and .sticky-top
- Updates utilities Sass to be split across more files (one for position, sizing, and spacing)
This commit is contained in:
Mark Otto 2017-01-02 11:45:30 -08:00
parent fa1ef15212
commit 21b28903a4
5 changed files with 35 additions and 21 deletions