Feature/hiseq to miseq samplesheet conversion

I think the script does what it is supposed to now.

Reviewer should in particular look to see if my assumptions about how information should be converted from MiSeq format to HiSeq format are correct. Here is the link to that:

https://github.com/vals/scilifelab/pull/new/SciLifeLab:develop...vals:feature/hiseq_to_miseq_samplesheet_conversion#L1R160