fix bamsplit manual page
refactor BAM indexing
remove obsolete function from BAM indexing class
move BamIndexGenerator class to libmaus
add script to .gitignore
add level option in documentation for bamcollate2
Merge branch 'experimental' of github.com:gt1/biobambam into experimental
fix help messages
bump libmaus version dependency
bump version after fixing read group processing in merging
Merge branch 'experimental' of github.com:gt1/biobambam into experimental