Added more unit tests for bed, gzip, and bgzipped files with large headers from file, redirect, pipe and fifo.

Fixed a bug in BamRecord::printUnmapped, added a unit test with with data file for unmapped Bam reads.

Moved short circuit for BAM unmapped reads to Record::sameChromIntersect for when query record isn't BAM but DB record is.

Shortened output buffer, corrected Chromsweep errors with some print options due to early termination.