Minor comment error fix and speed_byte mapping fix.#16

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bwshockley wants to merge 4 commits intoRailstars:masterfrom

bwshockley:patch-1

Commits on May 20, 2015

Update DCCHardware.c
bwshockley
committed

Commits on Jul 4, 2015

Update speed_byte to map analog values
bwshockley
committed

Commits on Apr 26, 2016