Update README.md

More keyboard info.

README.md

@@ -55,7 +55,7 @@ Supported platforms (including but not limited to) are:
 * `Gradient.h` : Allows you to access a vector of given objects using a normalized (0 to 1) t parameter. Useful for particle systems and things like that where it is used for color gradients.
 * `Drawing.h` : Features some drawing functions such as `bresenham::plot_line()`, `drawing::draw_box()`, `drawing::draw_box_textured()`, `drawing::draw_box_outline()` and `drawing::filled_circle_positions()`.
 * `GameEngine.h` : A highly customizable buy easy to use game engine (or engine for any real-time terminal-based program).
-* `Keyboard.h` : A keyboard handling API that is easy to use. Use class `StreamKeyboard` to poll key presses.
+* `Keyboard.h` : A keyboard handling API that is easy to use. Use class `StreamKeyboard` to poll key presses. Function `readKey()` scans keypresses in an un-blocked manner and returns a struct `KeyPressDataPair` containing two objects of type `KeyPressData`; `transient` and `held`. The former being the raw key presses and the latter being the raw key presses buffered in a buffer that has a size proportional to the FPS of the application.
 * `MessageHandler.h` : The `MessageHandler` class allows you to queue up messages of different severity levels and durations. Messages are displayed in a `ui::TextBox` in the middle of the screen.
 * `ParticleSystem.h` : This ASCII-style particle system allows you to make cool real-time VFX such as liquids and fire-smoke. See ([`SurgSim_Lite`](https://github.com/razterizer/SurgSim_Lite) and [`Pilot_Episode`](https://github.com/razterizer/Pilot_Episode) for examples).
 * `RC.h` : A struct representing the row and column position on the screen or in a texture or bounding box to mention a few.