add BCR, other chain support to run_mixcr
add BCR, other chain support to run_mixcr

BenaroyaResearch/bripipetools,jaeddy/bripipetools,jaeddy/bripipetools,BenaroyaResearch/bripipetools,jaeddy/bripipetools,BenaroyaResearch/bripipetools,BenaroyaResearch/bripipetools,jaeddy/bripipetools