Cambio de SASS a Stylus
Revert "Cambio de SASS a Stylus"

This reverts commit e5305e4f450010a44b02e30917c9b1298a61ef31.
Migration to Stylus instead of Sass
Excluded .DS_Store files
Build script now uses stylus compiler tools and a new option to specify compile target
Used for some dependencies and version information