[Add] Added controls to README.

README

@@ -10,3 +10,39 @@ Linux Packages:
    libgl1-mesa-dev
    libglu1-mesa-dev
 
+-- Controls --
+
+Thrust:
+~~~~~~~
+  2
+  W
+A   D
+  X
+
+W - Forward thruster
+S - Reverse thruster
+A - Left thruster
+D - Right thruster
+2 - Up thruster
+X - Down thruster.
+
+Rotation:
+~~~~~~~~~
+
+You can rotate your craft either with the cursor keys or by holding down the
+right mouse button and moving the mouse. Only mouse rotation is available
+in the external view.
+
+External View:
+~~~~~~~~~~~~~~
+
+  Cursor keys - Rotate view, pirtch and yaw
+  - and =  - Zoom in and out.
+
+Special:
+~~~~~~~~
+
+q - quit.
+i - show some ugly debug info.
+
+