Convert `extensions/index` to jsx and use react-intl to define/translate names and descriptions.

Another approach would be to have the title be part of what’s imported from `lib/libraries/decks/index.jsx`

The initial commit for this was before we hooked up the community to redux.

This allows the project to continue playing/retain state while toggling language or player state.

And implement toggle on player playground

Fixes issue with changing language, and hopefully player/editor mode (untested).

This is for demonstration purposes, if this is the way we decide, I will make official APIs on the VM and the Renderer for checking for the canvas and renderer.

Using the new `ScratchMsgs.translate` function to generate localized menus and default values in the toolbox.

Using `bowser` to detect tablets, and type of browser to call either `webkitRequestFullScreen()` or `mozRequestFullScreen()`

Full screen request must happen in reponse to a user-action, so it’s included in the ‘try-it’ handler for the preview modal.

Locale detection function that checks browser setting and lets URL parameter (locale= or lang=) override the browser setting.

Use Blockly messages for category names in the default toolbox XML to allow the names to be localized from the Msgs table.

* updated locales reducer to include current messages and messagesByLocale (the previous all messages)
* moved locales out of gui
* include locales in the things exported by gui (index.js)

All thumbnail images have been updated. Titles have been edited, How To's have been reordered. Make A Clicker Game, video link was updated.