add missing return statement
remove unused variables
use BAM output factory
bump libmaus version
Merge branch 'master' into experimental
use BAM decoder factory in bamsort
update help message
update documentation
bump libmaus version
bump version after commits

  * add output formats in bamsort
- fix md5 computation and indexing
- fix input/output binary checking
bump version after applying fixes in bamsort
correct help message