Add all Special Keys to file. Clarify that not all keys can be used as Modifiers. Correct that Buf[3:7] is NOT Reserved

[MasterExecuson]

Hello there!

Great compilation you have, but I missed some information, like the rest of the Special Keys, how to properly send Modifiers and Mainly!!!! Where were the rest of the modifiers keys (right control, left control, alt gr). I spent an afternoon trying to solve all this!

By any means I think it's perfect, but tried to help a bit ☺

Also the buf[2] to buf[7] accept keys too! Thats how we can press more than one key at the same time! Please Consider Merging this changes, this is very important for larger projects!

Thanks!!