Feat(Sass2Less): Change all variables. From $ to @
Feat(Sass2Less): Change all mixins.

* From @mixin to .
* From @include to .
Feat(Sass2Less): Fixes to make "grunt less:server" run successfully
Fix: update sprites for LESS

The problem is I put the sprites (flags) inside styles/ui/images folder
Feat: Update grunt task for LESS
Demo: Update preview photo