* PoC font autosize feature
* Take enumerables or 'auto' keyword for autoscaling
* Allo enumerables of font_size per card, where the largest font size that does not ellipsize is chosen
* Use ellipsize: :autoscale keyword to determine font autosizing
* Use binary search to find the correct font size
* Consider new ellipsize option in testcase
* Document ellipsize: :autoscale option
* Add ellipsize: :autoscale sample to text sample
* Fix double multiplication with Pango::SCALE
* Scale embedded images with text when autoscaling
* Remove stray semicolon
* Return dummy value for FontDescription.size in mock_cairo
* Update regression test data for autoscale feature.
* Add ellipsize: :autoscale example to existing font_autoscale sample
* Add missing :autoscale to list of options in documentation
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