doc: mention all CI targets, update the README and mainpage, add badges.

README.md

@@ -53,15 +53,15 @@ Graphics APIs:
 Platforms:
 
 *   **Linux** and embedded Linux (natively using GLX/EGL and Xlib or through
-    SDL2 or GLUT toolkit) [![Build Status](https://travis-ci.org/mosra/magnum.svg?branch=master)](https://travis-ci.org/mosra/magnum)
+    SDL2, GLFW or GLUT toolkit) [![Build Status](https://travis-ci.org/mosra/magnum.svg?branch=master)](https://travis-ci.org/mosra/magnum) [![Coverage Status](https://coveralls.io/repos/github/mosra/magnum/badge.svg?branch=master)](https://coveralls.io/github/mosra/magnum?branch=master)
-*   **Windows** natively or using ANGLE (through SDL2 or GLUT toolkit) [![Build status](https://ci.appveyor.com/api/projects/status/5b477m034cfaskse/branch/master?svg=true)](https://ci.appveyor.com/project/mosra/magnum/branch/master)
+*   **Windows** on both MSVC and MinGW, natively or using ANGLE (through SDL2, GLFW or GLUT toolkit) [![Build Status](https://ci.appveyor.com/api/projects/status/5b477m034cfaskse/branch/master?svg=true)](https://ci.appveyor.com/project/mosra/magnum/branch/master)
-*   **OS X** (through SDL2 toolkit) [![Build Status](https://travis-ci.org/mosra/magnum.svg?branch=master)](https://travis-ci.org/mosra/magnum)
+*   **OS X** (through SDL2 or GLFW toolkit) [![Build Status](https://travis-ci.org/mosra/magnum.svg?branch=master)](https://travis-ci.org/mosra/magnum)
-*   **iOS** (through SDL2 toolkit)
+*   **iOS** (through SDL2 toolkit) [![Build Status](https://travis-ci.org/mosra/magnum.svg?branch=master)](https://travis-ci.org/mosra/magnum)
 *   **Android** 2.3 (API Level 9) and higher
-*   **Windows RT** (Store/Phone) using ANGLE (through SDL2 toolkit)
+*   **Windows RT** (Store/Phone) using ANGLE (through SDL2 toolkit) [![Build Status](https://ci.appveyor.com/api/projects/status/5b477m034cfaskse/branch/master?svg=true)](https://ci.appveyor.com/project/mosra/magnum/branch/master)
 *   **Google Chrome** (through [Native Client](https://developers.google.com/native-client/),
     both `newlib` and `glibc` toolchains are supported)
-*   **HTML5/JavaScript** (through [Emscripten](https://github.com/kripken/emscripten/wiki))
+*   **HTML5/JavaScript** (through [Emscripten](https://github.com/kripken/emscripten/wiki)) [![Build Status](https://travis-ci.org/mosra/magnum.svg?branch=master)](https://travis-ci.org/mosra/magnum)
 
 FEATURES
 ========

doc/building.dox

@@ -629,13 +629,15 @@ building your projects for Android.
 
 @subsection building-ci-travis Travis
 
-In `package/ci/` there is `travis.yml` file with Linux GCC 4.7 and OSX Clang
+In `package/ci/` there is `travis.yml` file with Linux GCC 4.7, OSX Clang, iOS
-configuration. Online at https://travis-ci.org/mosra/magnum.
+GLES2/GLES3 and Emscripten WebGL1/WebGL2 configuration. Online at
+https://travis-ci.org/mosra/magnum. The Linux build has code coverage reports
+available online at https://coveralls.io/github/mosra/magnum.
 
 @subsection building-ci-appveyor AppVeyor
 
-In `package/ci/` there is `appveyor.yml` file with Windows MSVC configuration.
+In `package/ci/` there is `appveyor.yml` file with Windows desktop MSVC, MinGW
-Online at https://ci.appveyor.com/project/mosra/magnum.
+and Windows RT GLES2/GLES3 configuration. Online at https://ci.appveyor.com/project/mosra/magnum.
 
 @subsection building-ci-jenkins Jenkins
 

doc/mainpage.dox

@@ -77,9 +77,9 @@ Graphics APIs:
 Platforms:
 
 -   **Linux** and embedded Linux (natively using GLX/EGL and Xlib or through
-    SDL2 or GLUT toolkit)
+    SDL2, GLFW or GLUT toolkit)
--   **Windows** natively or using ANGLE (through SDL2 or GLUT toolkit)
+-   **Windows** using both MSVC and MinGW, natively or using ANGLE (through SDL2, GLFW or GLUT toolkit)
--   **OS X**, **iOS** (through SDL2 toolkit)
+-   **OS X**, **iOS** (through SDL2 or GLFW toolkit)
 -   **Android** 2.3 (API Level 9) and higher
 -   **Windows RT** (Store/Phone) using ANGLE (through SDL2 toolkit)
 -   **Google Chrome** (through [Native Client](https://developers.google.com/native-client/),