* 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.
* Adding new theme Hall from @henriqueiamarino
* Removed 'theme' attribute
* Removed 'ref' attributes from navigation
* Removed unused pattern
* Cleaned up theme.json file (saved via CBT)
* Set version to 1.0.0
* Fixed Header templates to use Site Title instead of Header. Styled Site Title to match Header block that was removed.
* Updates from latest zip
* Update image refs in readme
* Add strict_types
* Patternise 404 and home templates
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Co-authored-by: Sarah Norris <sarah@sekai.co.uk>