v0.9 Beta release

- SCSS preprocessing added;
- GruntJS build system added (currently is at early stage of
automation);
- SCSS-powered @media grid calculator added (thanks to Nicolas Gallagher
for his Griddle);
- Breakpoints demo HTML file added;
- LICENSE file added;
- Minor changes to minify.js (white space in-between inline-blocks
removal script);
- Scott Jehl's respond.js script is used no more;
- Inversed (ltr/rtl) grid direction added;
- Double gutter class (.c-c) modifier added;