Added vacation notice

README.txt

@@ -15,9 +15,13 @@ Serve autogenerated WebP images instead of jpeg/png to browsers that supports We
 
 Almost 4 out of 5 mobile users use a browser that is able to display webp images. Yet, on most websites, they are served jpeg images, which are typically double the size of webp images for a given quality. What a waste of bandwidth! This plugin was created to help remedy that situation. With little effort, Wordpress admins can have their site serving autogenerated webp images to browsers that supports it, while still serving jpeg and png files to browsers that does not support webp.
 
-**Security notice**
+!! **SECURITY NOTICE** !!
 Security issues has recently been found and fixed. I urge you to upgrade to the latest release (at least 0.14.11, but go with 0.14.15, as there are important bug fixes)
 
+**Vacation notice**
+The maintainer is on vacation most between June the 30th and end July. Please help each other out. In case something cannot wait, remember that this library is open source. You can find it on github, fork it and fix it (or have someone do it for you).
+
+
 ### The image converter
 The plugin uses the [WebP Convert](https://github.com/rosell-dk/webp-convert) library to convert images to webp. *WebP Convert* is able to convert images using multiple methods. There are the "local" conversion methods: `cwebp`, `gd`, `imagick`. If none of these works on your host, there are the cloud alternatives: `ewww` (paid) or connecting to a Wordpress site where you got WebP Express installed and you enabled the "web service" functionality.