Add MouseButton api

docs/api/MouseButton.md

@@ -0,0 +1,42 @@
+# MouseButton
+
+An enum with all the available mouse buttons.
+
+## Source code
+
+Read the [source code](https://github.com/Apostolique/Apos.Input/blob/master/Source/MouseButton.cs).
+
+## LeftButton
+
+```csharp
+MouseButton.LeftButton
+```
+Left mouse button.
+
+## MiddleButton
+
+```csharp
+MouseButton.MiddleButton
+```
+Middle mouse button.
+
+## RightButton
+
+```csharp
+MouseButton.RightButton
+```
+Right mouse button.
+
+## XButton1
+
+```csharp
+MouseButton.XButton1
+```
+XButton1 mouse button.
+
+## XButton2
+
+```csharp
+MouseButton.XButton2
+```
+XButton2 mouse button.

docs/api/README.md

@@ -12,5 +12,5 @@
   * KeyboardCondition
   * MouseCondition
   * GamePadCondition
-* MouseButton
+* [MouseButton](MouseButton.md)
 * GamePadButton