BSB Format Version 3.0

[jaybo_nomad]

I just started using GDAL, and noticed it parses Maptech BSB files in 
version 2.x format just fine, but gives up on version 3.0 format. 
The first hint of failure is at line 265 in bsb_read.c:

(psInfo->nPCTSize == 0) 

but this is probably just a symptome of something much more seriously 
amis. Before I waste too much time trying to reverse engineer the 
format changes, I was curious if anyone else has already done the 
work.

- Jay