a start at documenting plugin class changes
merge plugin changes into main table
Merge pull request #10682 from gordonwoodhull/master

Suggest documenting changes to plugin classes
Sort by name.
Use single quotes consistently.
Minify css with clean-css.
Show minification report for uglify-js.
Remove unused variables.
Update holder.js to v 2.1.0.
Update jszip.js to the latest git.