Update IgBLAST example to include c_call

[ssnn]

Update this script to include c_call:

https://bitbucket.org/kleinstein/changeo/src/master/docs/examples/scripts/IgBLAST_Commands.sh

[ssnn]

# Constant region database
edit_imgt_file.pl IMGT_Human_IGHC.fasta > ~/share/igblast/fasta/imgt_human_ig_c.fasta
makeblastdb -parse_seqids -dbtype nucl -in ~/share/igblast/fasta/imgt_human_ig_c.fasta \
    -out ~/share/igblast/database/imgt_human_ig_c.fasta

Results in error:

BLAST Database creation error: Error: Duplicate seq_ids are found: 
LCL|IGHA1*01

But it works if we replace the edit_imgt_file.pl step and use our script clean_imgtdb.py instead to prepare the -in sequences.

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