Added remaining related projects to README, badges for all of them.

README.md

@@ -152,15 +152,25 @@ The engine itself is kept as small as possible with only little dependencies.
 Additional functionality, often depending on external libraries, is provided in
 separate repositories.
 
+*   **Corrade** -- main Magnum dependency, multiplatform utility library:
+    https://github.com/mosra/corrade
+    [![Linux/OSX Build Status](https://travis-ci.org/mosra/corrade.svg?branch=master)](https://travis-ci.org/mosra/corrade) [![Windows Build Status](https://ci.appveyor.com/api/projects/status/afjjlsgtk6jjxulp/branch/master?svg=true)](https://ci.appveyor.com/project/mosra/corrade/branch/master)
 *   **Magnum Bootstrap** -- bootstrap projects for many use cases, helping you
     get up and running in no time: https://github.com/mosra/magnum-bootstrap
 *   **Magnum Plugins** -- various importer plugins for image, font, audio and
     3D model formats is at https://github.com/mosra/magnum-plugins
+    [![Linux/OSX Build Status](https://travis-ci.org/mosra/magnum-plugins.svg?branch=master)](https://travis-ci.org/mosra/magnum-plugins) [![Windows Build status](https://ci.appveyor.com/api/projects/status/nkdlwaxm2i9d6vpx/branch/master?svg=true)](https://ci.appveyor.com/project/mosra/magnum-plugins/branch/master)
 *   **Magnum Integration** -- integration with various external math and
     physics, get it at https://github.com/mosra/magnum-integration
+    [![Linux/OSX Build Status](https://travis-ci.org/mosra/magnum-integration.svg?branch=master)](https://travis-ci.org/mosra/magnum-integration) [![Windows Build Status](https://ci.appveyor.com/api/projects/status/hs6ykva1ld74vavr/branch/master?svg=true)](https://ci.appveyor.com/project/mosra/magnum-integration/branch/master)
 *   **Magnum Examples** -- examples of engine usage, varying from simple
     *Hello World*-like example to more advanced applications, such as viewer
     for complex 3D models. See it at https://github.com/mosra/magnum-examples
+    [![Linux/OSX Build Status](https://travis-ci.org/mosra/magnum-examples.svg?branch=master)](https://travis-ci.org/mosra/magnum-examples) [![Windows Build Status](https://ci.appveyor.com/api/projects/status/33qdqpdc5n0au3ou/branch/master?svg=true)](https://ci.appveyor.com/project/mosra/magnum-examples/branch/master)
+*   **Magnum Extras** -- playground for testing new APIs, specialized stuff
+    that doesn't necessarily need to be a part of main Magnum repository or
+    mutually exclusive functionality: https://github.com/mosra/magnum-extras
+    [![Linux/OSX Build Status](https://travis-ci.org/mosra/magnum-extras.svg?branch=master)](https://travis-ci.org/mosra/magnum-extras) [![Windows Build status](https://ci.appveyor.com/api/projects/status/f75u5eow2qiso7m5/branch/master?svg=true)](https://ci.appveyor.com/project/mosra/magnum-extras/branch/master)
 *   **libRocket integration** -- integrates Magnum as rendering backend into
     [libRocket](https://github.com/libRocket/libRocket) GUI library:
     https://github.com/miguelmartin75/Magnum-libRocket