Fixed the absent/removed sprite on experimental welding tools.
Added in two new manuals by Magmaram for atmospherics and EVA.
Added two new manuals by MagmaRam to the default engineering manual bookcase.
Updated sprites for the Captain and Centcomm stamps to look a bit more distinctive and official.
Added in sprites for two new manuals by MagmaRam.
Merge pull request #3831 from Nanai/dev

Guide/Manual addition, sprite fix!