removed dont_use_get_lanes option for mapping jobs
split get_mapping_jobs_from_vrtrack into two functions.
Merge pull request #212 from CraigPorter/mapping-get-lanes

Mapping get lanes
Able to delete files produced from any assembler, not just velvet
Added missing punctuation and also the other pool fastq files ending e, o and pl
Merge pull request #213 from nds/clean_up_non_velvet_assembler_files

Clean up non velvet assembler files