Moved variables to _variables.scss
All variables, mixins and functions must be declared here.
Initial commit. Separated media queries.
Stylesheets to handle different screen resolutions/pixel ratios.
Changed extension.
Added missing semicolons.
Removed slash from name. Only only-importable files shoud have it.
Removed unnecessary scss files. Now using *dpi.scss ones.
Different display-density media queries.