support for latest IMGT db by adding unzip

Added logic to check for the existence of the HLA fasta file and unzip if necessary.

Update README.MD

readme

add select_reference.py: sort the mapped allele based on the depth, w…

…e can construct sample-specific reference

fix the bug in read name recognition

clarify interpret output

enables updating to the latest IMGT/HLA database for annotation

upload pedhap

upload benchmark results