* 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