Fixes problems related to increment badge

- name conventions are aweful in PushController
- properly looks at the badge into body.data instead of body
- We may want to refactor that as it's confusing to use a full body

spec/Parse.Push.spec.js

@@ -0,0 +1,59 @@
+describe('Parse.Push', () => {
+  it('should properly send push', (done) => {
+      var pushAdapter = {
+        send: function(body, installations) {
+          var badge = body.data.badge;
+          installations.forEach((installation) => {
+            if (installation.deviceType == "ios") {
+              expect(installation.badge).toEqual(badge);
+              expect(installation.originalBadge+1).toEqual(installation.badge);
+            } else {
+              expect(installation.badge).toBeUndefined();
+            }
+          });
+          return Promise.resolve({
+            body: body,
+            installations: installations
+          });
+        },
+        getValidPushTypes: function() {
+          return ["ios", "android"];
+        }
+      }
+    setServerConfiguration({
+      appId: Parse.applicationId,
+      masterKey: Parse.masterKey,
+      serverURL: Parse.serverURL,
+      push: {
+        adapter: pushAdapter
+      }
+    });
+    var installations = [];
+    while(installations.length != 10) {
+      var installation = new Parse.Object("_Installation");
+      installation.set("installationId", "installation_"+installations.length);
+      installation.set("deviceToken","device_token_"+installations.length)
+      installation.set("badge", installations.length);
+      installation.set("originalBadge", installations.length);
+      installation.set("deviceType", "ios");
+      installations.push(installation);
+    }
+    Parse.Object.saveAll(installations).then(() => {
+      return Parse.Push.send({
+        where: {
+          deviceType: 'ios'
+        },
+        data: {
+          badge: 'Increment',
+          alert: 'Hello world!'
+        }
+      }, {useMasterKey: true});
+    })
+    .then(() => {
+      done();
+    }, (err) => {
+      console.error(err);
+      done();
+    });
+  });
+});