Support for pause/resume of game rendering loop (#476)

* added pause/resume

* don't override displaymode in game engine

* avoid setting light sensing display mode

libs/core/_locales/core-jsdoc-strings.json

@@ -81,12 +81,15 @@
   "game.gameOver": "Displays a game over animation and the score.",
   "game.invalidSprite": "Gets an invalid sprite; used to initialize locals.",
   "game.isGameOver": "Indicates if the game is display the game over sequence.",
+  "game.isPaused": "Indicates if the game rendering is paused to allow other animations",
   "game.isRunning": "Gets a value indicating if the game is still running. Returns `false` if game over.",
   "game.level": "Gets the current level",
   "game.levelUp": "Increments the level and display a message.",
   "game.life": "Gets the current life",
+  "game.pause": "Pauses the game rendering engine to allow other animations",
   "game.removeLife": "Removes some life",
   "game.removeLife|param|life": "TODO",
+  "game.resume": "Resumes the game rendering engine",
   "game.score": "Gets the current score",
   "game.setLife": "Sets the current life value",
   "game.setLife|param|value": "TODO",
@@ -142,6 +145,7 @@
   "input.temperature": "Gets the temperature in Celsius degrees (°C).",
   "led": "Control of the LED screen.",
   "led.brightness": "Get the screen brightness from 0 (off) to 255 (full bright).",
+  "led.displayMode": "Gets the current display mode",
   "led.enable": "Turns on or off the display",
   "led.fadeIn": "Fades in the screen display.",
   "led.fadeIn|param|ms": "TODO",

libs/core/_locales/core-strings.json

@@ -236,6 +236,8 @@
   "game.addScore|block": "change score by|%points",
   "game.createSprite|block": "create sprite at|x: %x|y: %y",
   "game.gameOver|block": "game over",
+  "game.pause|block": "pause",
+  "game.resume|block": "resume",
   "game.score|block": "score",
   "game.setScore|block": "set score %points",
   "game.startCountdown|block": "start countdown|(ms) %duration",