* Lossless image optimization (using ImageOptim).
This shouldn't change the visual appearance of any images. ImageOptim
was run with the highest compression setting except that JPEG metadata
stripping was disabled because some users prefer to avoid stripping
JPEG metadata.
* Update READMEs that have Changelogs for themes impacted by lossless image optmization change.
* Bibliophile: add theme
* remove theme attribute from templates
* update patterns and templates
* clean theme.json settings and styles
* compress screenshot and update license information
* update version and theme uri
