SEO, Favicon, logo, +helper classes

- added SEO relevant meta tags
- added Favicon, Touch-icon… markup
- added Photoshop CS5 Droplet for Favicon sizes
- logo now <a> with title tag, for logo as background image
- padding-helper class
- .frame now [class=*frame] to build variant-classes with bas frame
styling (e.g. content-frame, narrow-frame…)
- font-smoothing helper classes