Update README for minor changes in test framework
Update deltablast output using BLAST+ 2.2.30 and new cdd_delta database

Was failing as follows:

$ deltablast -query rhodopsin_proteins.fasta -subject four_human_proteins.fasta -evalue 1e-08 -out deltablast_rhodopsin_vs_four_human.tabular -outfmt 6 -rpsdb /data/blastdb/ncbi/cdd/cdd
BLAST engine error: /data/blastdb/ncbi/cdd/cdd_delta contains no frequency ratios needed for composition-based statistics.
Please disable composition-based statistics when searching against /data/blastdb/ncbi/cdd/cdd_delta.

I had to fetch a newer cdd_delta.tar.gz file which now includes cdd_delta.freq
See http://blastedbio.blogspot.co.uk/2014/10/deltablast-rpsblast-no-frequency-ratios.html