Add a copyright header (that from the .pot file generated by `makepot`) to all .po files, for consistency.
Don't cascade grunt-autoprefixer output in CSS files. The module changed its default value of `cascade` to `true` in version 1.0.1. See WP Core [30069].
Update the Japanese translation for TablePress 1.5.
Use a https URL to wordpress.org in the .pot file.
Fix punctuation in some inline documentation in controller-frontend.php. Missed in f2fc94660c709726bd4f9c56400e3ffdd167f197.