Parallelize BAM chunks

[thejmazz]

• parallelization with patches of bam
• for example, split bam into 20 sections if 20 cores available
• both options: concatenate vs. run analysis on regions

Example:

• get whole genome reference, produce BAM from it
• run, in parallel, a task on each chromosome
• for each chromosome task, after its done do further analysis AND
• after all chromosomes finish, do something that needs all of them (e.g. GWAS)

[thejmazz]

@tiagofilipe12 this is related to #66