[Lib] Implement default theme SASS file

[xak]

Make a theme file that will serve as the settings base

Detailed description

Instead of importing settings into every SASS file, use the theme file which will include the base settings. A default theme can be added in theme dir.

The main change is that each SASS file should now import the following ...

@import "theme";
@import "mixins";
@import "functions";

[xak]

This approach is not correct. Closing!