Add altimeter app

apps/altimeter/ChangeLog

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+0.01: New App!

apps/altimeter/app-icon.js

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+require("heatshrink").decompress(atob("mEw4UA///t9TmuV3+GJf4AN+ALVgf8BasP/4LVn//4ALUWgJUJBZUDBYJUIBZcP3/nKhEOt/WBZE5r+VKg0KgEVr9V3wLHqtaqt9sALElWAqoABt1QBZNeBYuq0ILCrVUBYulBYVWBYkCBYgABBZ8K1WVBYlABZegKQWqBQlVqALKqWoKQWpBYtWBZeqKRAAB1WABZZSHAANq0ALLKQ6qC1ALLKQ5UEAH4AG"))

apps/altimeter/app.js

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+// place your const, vars, functions or classes here
+
+// clear the screen
+g.clear();
+
+var n = 0;
+
+// redraw the screen
+function draw() {
+  g.reset().clearRect(Bangle.appRect);
+  g.setFont("6x8").setFontAlign(0,0).drawString("Up / Down",g.getWidth()/2,g.getHeight()/2 - 20);
+  g.setFont("Vector",60).setFontAlign(0,0).drawString(n,g.getWidth()/2,g.getHeight()/2 + 30);
+}
+
+// Respond to user input
+Bangle.setUI({mode: "updown"}, function(dir) {
+  if (dir<0) {
+    n--;
+    draw();
+  } else if (dir>0) {
+    n++;
+    draw();
+  } else {
+    n = 0;
+    draw();
+  }
+});
+
+// First draw...
+draw();
+
+// Load widgets
+Bangle.loadWidgets();
+Bangle.drawWidgets();

apps/altimeter/metadata.json

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+{ "id": "altimeter",
+  "name": "Altimeter",
+  "version":"0.01",
+  "description": "Simple altimeter that can display height changed using Bangle.js 2's built in pressure sensor.",
+  "icon": "app.png",
+  "tags": "tool,outdoors",
+  "supports" : ["BANGLEJS2"],  
+  "storage": [
+    {"name":"altimeter.app.js","url":"app.js"},
+    {"name":"altimeter.img","url":"app-icon.js","evaluate":true}
+  ]
+}