IMGT parser fix

[Giorgio Verde]

Hi all

There are a couple of bugs in the IMGT parser in the current
distribution. Please replace your imgt.is and imgt.i files in the $SRSDB
directory with the ones downloaded from:

http://srs.ebi.ac.uk:5000/srs5bin/cgi-bin/wgetz?-fun+PageIcarusFile+-l+IMGT+-ifile+is
http://srs.ebi.ac.uk:5000/srs5bin/cgi-bin/wgetz?-fun+PageIcarusFile+-l+IMGT+-ifile+i

NOTE: the configuration is for GCG format

An indexing and an access bug are fixed

Giorgio Verde