readme update, close #333, close #234

Author: bl00mber

README.md

@@ -318,7 +318,9 @@ import es from 'react-phone-input-2/lang/es.json'
 />
 ```
 
+#### Flexible mask
 If `enableAreaCodeStretch` is added, the part of the mask with the area code will not stretch to length of the respective section of phone mask.
+Example: `+61 (2), +61 (02)`
 
 ### Custom masks
 ```jsx
@@ -474,6 +476,7 @@ To clear `country`, pass `null` as `value`.
 ## Contributing
 - Code style changes not allowed
 - Do not create issues about incorrect or missing country masks (of already present countries) or absent area codes (they will be closed). Only create issues if the subject is an actual mechanism that is not present in the component. Otherwise create a PR with a link that proves the correctness of your newly suggested mask or list of area codes
+- Do not send new languages
 
 ## License
 [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/bl00mber/react-phone-input-2/blob/master/LICENSE)