Package "Raspberry Pi GPIO 40-Pin" is not clear enough

[ubruhin]

See #4 (comment):

For me it's not clear what the "Raspberry Pi GPIO 40-Pin" package actually represents. Is it a pin header, a pin socket, or only "naked" pads? As there are silkscreen and documentation on the top layer, it suggests that something gets mounted on the top. But wouldn't then the pads need to be mirrored to get connected to the corresponding pin headers when plugging onto a Raspberry Pi?