Fix too many letters

[MarkOates]

Allegro has inefficient naming conventions. Specifically, typing ALLEGRO_* for every constant is a waste of precious key tying time.

This PR fixes this by replacing all ALLEGRO_* constants with A50_*.

Since "ALLEGRO_" takes takes 9 keystrokes (including SHIFT) and "A5O_" takes 6 (including a second re-press of SHIFT), this is a productivity increase of a whopping 33.33% for ALL Allegro users.

[pedro-w]

This is great, and very insightful. Similarly, long words such as 'bitmap' or 'display' could be replaced by 'b' and 'd' respectively for greater efficiency improvement.

[Iniquitatis]

This is great, and very insightful. Similarly, long words such as 'bitmap' or 'display' could be replaced by 'b' and 'd' respectively for greater efficiency improvement.

Don't forget about s for semaphore and m for mutex! 🧐

[pmprog]

Allegro has inefficient naming conventions. Specifically, typing ALLEGRO_* for every constant is a waste of precious key tying time.

This PR fixes this by replacing all ALLEGRO_* constants with A50_*.

Since "ALLEGRO_" takes takes 9 keystrokes (including SHIFT) and "A5O_" takes 6 (including a second re-press of SHIFT), this is a productivity increase of a whopping 33.33% for ALL Allegro users.

Seems a really odd question, but you start by mentioned A50, then you go to A5O, with a letter O rather than a zero.
Is there much need for either? Surely A5_ would be sufficient enough?
I'm in favour :)