======DS 1.57======
====(09-Nov-2017)====
- Added built-in support for programming Espruino devices over USB/OTG cable.

- Added new !screenshot command to Wifi editor debug tab -> /sdcard/screenshot.jpg

- Re-instated the app.GoToSleep() method.

- Internally mapped '/sdcard' path to users external/internal public directory.

- Added new 'Power' mode keyword to app.SetKioskMode (blocks use of power key).

- Added 'response' parameter to app.UploadFile() callback=>(status,file,response).

- Added new app.ClearValue(name,file) method to remove prefs values.