Martin Konicek a6adc501e8 Add a hint to a very common AppRegistry error ...

Summary:
**Motivation (why should we merge this?)**

I see the following error very often when working on multiple apps and switching between them. In fact, switching between apps is the only reason why I ever saw the error. However, the error message is very unhelpful:

![screenshot 2017-02-22 16 15 29](https://cloud.githubusercontent.com/assets/346214/23221214/5f6bc7ba-f91c-11e6-9482-9183c27c5e9d.png)

**Test plan (required)**

![screenshot 2017-02-22 19 44 54](https://cloud.githubusercontent.com/assets/346214/23229247/830f7142-f937-11e6-9657-bad83563f3b0.png)
Closes https://github.com/facebook/react-native/pull/12517

Differential Revision: D4600082

Pulled By: mkonicek

fbshipit-source-id: 011c71dbac9e294348fd06c8e6d651228fac3288

2017-02-22 14:16:06 -08:00

..

AppContainer.js

Fix passThroughTouches

2017-01-23 11:28:51 -08:00

AppRegistry.js

Add a hint to a very common AppRegistry error

2017-02-22 14:16:06 -08:00

I18nManager.js

Reorganize core JS files

2016-10-11 10:14:28 -07:00

queryLayoutByID.js

Reorganize core JS files

2016-10-11 10:14:28 -07:00

renderApplication.js

Deploy v0.35.0

2016-11-14 20:45:17 -08:00

requireNativeComponent.js

Deal with 0.38 'FlowFixMe's

2017-01-31 13:13:32 -08:00

UIManager.js

access view managers as Native Modules

2017-01-20 15:58:27 -08:00

UIManagerStatTracker.js

Wrapped UIManager native module for better abstraction

2015-11-27 07:00:32 -08:00

verifyPropTypes.js

Reorganize core JS files

2016-10-11 10:14:28 -07:00

YellowBox.js

RN: Fix YellowBox Layout Bug

2017-02-08 19:17:08 -08:00