* 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.
* Marl: Initial commit.
* Moved header customization from templates to header template part.
* Raised WP version from 5.8 to 5.9
* Raised WP version from 5.8 to 5.9
* Corrected template parts folder to 'parts'
* Update marl/readme.txt
Co-authored-by: Jason Crist <jcrist@pbking.com>
Co-authored-by: Ben Dwyer <ben@scruffian.com>
