vasudeva8

added thread pool to tabix operations

1

Fixes #1735. Added option to provide number threads to use, disabled by default. Uses the thread pool in operations except listing of sequence names (-l).

Demo / sample code update

8

Samples updated with fasta/fastq index using, tabix index and thread pool queueing of tasks.

faidx with bgzf compressed output

2

fixes #2055 fasta/fastq output of faidx/fqidx will be bgzf compressed if the output file has an extension of .gz/.bgz/.bgzf. stdout will not be compressed. also added extended option output-fmt-option to...