Concatenate variant files split by regions using a simplified approach that avoids GATK overhead and file locking issues. Requires sorting files by region then simple concat in order
Additional updates to in-development installation process: Bug fixes, better progress reporting and write output system YAML files
Additional work to finalize new installation and upgrade approach: pointer to new minicona, minimum installation support and documentation start
Ensure good helper messages when no parameters specified for bcbio_nextgen