- [framework] some cosmetic updates for comments
- [mixins] added mixins for ouputing icons and sprites from maps
- [mixins] moved vendor-specific mixins into separate file
- [framework] added typography, icons, sprites and vendor mixins imports
- [generic][misc] renamed `transitions.scss` to `animations.scss`; better comments formatting
- [framework] added animations import
- [generic] updated link in `animations`