Update README to match current state of the app & list TODOs
Update README to match current state of the app & list TODOs

feedhenry/cordova-app-harness,apache/cordova-app-harness,guozanhua/chrome-app-developer-tool,guozanhua/chrome-app-developer-tool,apache/cordova-app-harness,feedhenry/cordova-app-harness,apache/cordova-app-harness,feedhenry/cordova-app-harness,apache/cordova-app-harness,guozanhua/chrome-app-developer-tool,guozanhua/chrome-app-developer-tool,feedhenry/cordova-app-harness