Added a new chapter about the keyboard state and the key states for simple key input handling. Updated the Text and Font chapter.

It seems the author of p_daniel’s (or danpla’s) SDL 2.0 units has deleted his github account (EDIT, 06/10/2019: The user name got changed.), hence I updated the discussion page about which unit to choose. Also the official website of the Bare game project seems to be offline. Thanks for the hints Stéphane.

A new impressive, commercial SDL2 based Pascal project called Savage Vessels has been added to the project list. The project list itself got restructured for better readability and loading times.