Switch auto on by default for world cancer day.
Make button linkback to checkyourc.com when auto is enabled and revert
version to more sane 0.1.0.
Made generated markup use an explicit </div>, closes #58.
Make auto the default for checkyourc.com so even when we switch off the
default auto setting it will still be auto for checkyourc.com. Closes
issue #54.

This implies that all the logic for documentation/examples needs to be
refactored.
Changed main headline copy, closes #50.
Remove stable status from the home page, unnecessary clutter.
Reset all border-image properties for img elements used on buttons, this
improves the issues seen on some blogs although not perfect, it is much
better, closes #60.
Change blue colour for more contrast and better legibility on some
displays, closes #53.
Reset padding and border-width so the button now looks good at
http://bitstokeepsafe.blogspot.co.uk/.