* Progress towards: #1671: Close web socket before making a new one for hardware extensions.
* Always disconnect before scanning for new peripheral. Removing console logs.
* Removing unused test code.
* Beginning refactor: renaming 'device' to 'peripheral', shortening function names, reordering functions, etc.
* Continuing refactoring: renaming some functions to be more verbose in the runtime, adding JSDocs, etc.
* Changing 'device' to 'peripheral', etc.
* Changing 'session' to 'socket'.
* Fixing EV3 menus and menu arg validation, reordering functions, etc.
* Add _send, add some references to documentation, etc.
* Factored out _outputCommand and _inputCommand, renamed some enums, etc.
* Fixed _outputCommand, some other minor cleanup.
* Make _outputCommand and _inputCommand public.
* Added TODO.
* Renamed BLE UUID enums to be clearer.
* Change WeDo2 in comments to WeDo 2.0, etc.
* Changed some WeDo2Motor command names, cleaned up some JSDocs.
* Beginning a major EV3 refactor.
* WeDo2 formatting and comment changes.
* Motor refactoring in EV3: motorTurnClockwise and motorTurnCounterClockwise initial working state.
* Add reminders to possibly cast motor menu args in WeDo2.
* Continue to move motor commands in EV3 to EV3Motor class, don't create new EV3Motor on every poll cycle, etc.
* Factoring EV3 polling value commands, etc.
* Fixing EV3 motor power, position and button pressed, and some commenting, etc.
* Move EV3 motor position parsing to EV3Motor class, move directCommand and directCompoundCommand functions, some commenting, etc.
* Changed WeDo2 motor label enum name.
* Removed some EV3 motor functions that aren't needed, changed menu label enum names, moved some opcodes up to enums.
* Fixing comments and documentation.
* Some commenting.
* Adding further documentation and references to PDFs, changed reply check to be safer, etc.
* Some comment changes.
* Moving some functions around in EV3 and WeDo2 to match.
* Commenting, etc.
* Some renaming of session, etc.
* Fix stopAllMotors in EV3.
* Fixing clearing of motors in EV3.
* Some comment changes.
* Change runtime .extensions/registerExtension to .peripheralExtensions/registerPeripheralExtension.
* Renaming outputCommand/inputCommand to generateOutputCommand/generateInputCommand, etc.
* Moved motorCommandIDs to EV3Motor class, renamed directCommand to generateCommand, etc.
* Adding a reminder to rename something.
* JSDoc fix in EV3Motor class.
* Fixing microbit function name.
* Adding a todo item.
* Changing Ev3 menu formats to be backwards compatible, moving a BLE function up.
* Fixing EV3 ports again, and button pressed returning a boolean.
* Fixing menu value to be a string in EV3.
* Replace micro:bit block text with formatMessage calls
* Add l10n support to micro:bit block menus
* Remove A, B button translation, update some l10n descriptions
* Fix mismatched l10n description
* First microbit gui tests
* Fixed JSONRPC inheritance. Renamed ScratchBLE/ScratchBT files. Removed ScratchBT test code from Microbit extension. Renamed addLine to log.
* Fixed log comments. Removed addLine from Microbit.
* Adding auto-connect to Microbit at extension loading. Adding hack for displayText block to Scratch-Link.
* Resolved merge conflicts and brought in latest microbit extension example code.
* Updated microbit write tests for displayText and displaySymbol blocks. Some linting.
* Some linting and adding of BLE Characteristic consts.
* Linting fixes.
* Moving micro:bit device connection code all to the MicroBit class, decoupling Scratch3MicroBitBlocks from connection code.
* Removing old disconenct handlers from MicroBit class. Moved service into new BLEUUID data structure.
* Renamed _write to _send. Moved all BLE encoding concerns to the _send method.
* Using the util log. Some linting.
* Added _read method to MicroBit class. Renamed _send to _write.
* Some linting and formatting comments.
* First pass at peripheral chooser pattern for ScratchBLE.
* Testing characteristicDidChange events, and some changes to ScratchBLE on ready events.
* Refactoring work on PeripheralChooser and ScratchBLE.
* Some variable renaming and method signature stubs.
* Peripheral chooser method signatures.
* Moved base64 encoding/decoding to util. Some method signature formatting.
* Adding test stubs for new util and io classes.
* Adding test stub for MicroBit extension.
* Clean up for PR.
* Clean up for PR.
* Final cleanup for PR.
* Removed logging to console.
* Adding 'btoa' and 'atob' node modules and using them in Base64Util.
* Add micro:bit Scratch 3.0 extension
* Fix lint errors in micro:bit extension
* Fix doc. Incorrect return type
* Check for valid pin in when pin connected block
* Drop mapping function
* Drop question mark from tilt hat block
* Generate list of symbols from object keys
* Trim display text block to max 20 characters
