* 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.
* Move the finished version of the codelab
This moves the finished version of the codelab to
app-completed so it's at the same level as the starting
app code.
* Fix paths to be relative
The paths for blockly files and media were absolute, which would
break if you ran it from any directory that wasn't identical.
* Add Blockly for the Web codelab code
* Adding licences and comments as per review
* Renaming a4/b4 sounds to a5/b5
* Define blocks with defineBlocksWithJsonArray istead of jsonInit
