Swapped pcb labels

[brentfpage]

In /PCB/Tinylab_proto1.kicad_pcb , the labels of Scope_Ch(1 vs. 2)_DC are swapped relative to those in the pinout (https://github.com/espotek-org/Labrador/wiki/Pinout) and in the desktop interface (and similarly for the Scope_Ch(1 vs. 2)_AC labels). Also, the labels of PDI_(CLK vs. DATA) in the PCB are swapped relative to those indicated by the ATxmega32A4U data sheet (page 66 of the document here https://www.microchip.com/en-us/product/ATxmega32A4U).

[freshLobster]

In addition to the afore mentioned inconsistencies I noticed that the PCB files here are labeled "batch 1" on the silkscreen layer whereas on my unit it is marked "batch 2"

[freshLobster]

Swapped the PDI_(CLK & DATA) PCB labels in PR #425, but I think going through the trouble of swapping Scope_Ch1_DC and Scope_Ch2_DC is not of any significant benefit versus the increased human-error risk that it could introduce.
edit: My bad, I'm putting this in it's own PR after #431 is pulled.