Add a paragraph about the COC in a more prominent position
Favicon in normal and retina resolution

16x16 and 32x32 pixel, based on http://davidwalsh.name/retina-favicons
Added XING link for Jasmin. Closes #17
Favicon & touch icons are now included in the build & deployment scripts
Changed times & schedule. Added sixth speaker slot.
Removed debugging fragment
Added Steffen as a speaker
Touch icons and iOS 7 web app meta tags

Touch icons for normal and retina resolution with iOS 7 icon sizes for
iPhone and iPad, meta tags to enable iOS full screen mode, title and
translucent status bar.

This commit also depends on the build script adjustment by Sebastian
because the PNG touch images are referenced in the meta tags and need
to be suffixed with hash string.