* Google changed from an Inc to an LLC.
This happened back in 2017 but we didn’t notice. Officially we should update files from Inc to LLC when they are changed as part of regular edits, but this is a nightmare to remember for the next decade.
* Remove project description/titles from licenses
This is no longer part of Google’s header requirements. Our existing descriptions were useless (“Visual Blocks Editor”) or grossly obselete (“Visual Blocks Language”).
* License no longer requires URL.
* Fix license regexps.
* Disconnecting child block even if it cannot be connected to parent block.
* Bump disconnected child block.
* Added method for behavior on failed connection and updated expected behavior of unplug in unit tests.
* Removing obsolete TODO and calling new helper method in tests.
* Moved comment icons to use a model-based system. The block holds the model of the comment, and the comment icon holds a reference to it.
* Reorganized the setVisible function.
* Changed how xml.js serializes and deserializes comments.
