add method for getting unparse value in ArgInfo class
make compression default lz test in testlz
* add methods for filter and sorting aux fields in BAM entries
* add method for adding number aux field to BAM entry
add function for adding aux number field in BAM entry
refactor BamWriter class and add parallel BAM writing
added put function to parallel bgzf compression class
add clone function for LinearHashTrie class
add test functionality for parallel BAM writing
added new files to Makefile.am
add more clone functionality