Add option for sequencing centre in BAM file

[ewels]

Bowtie 1

Output options:
--sam-RG <text>
Add (usually of the form TAG:VAL, e.g. ID:IL7LANE2) as a field on the @rg header line. Specify --sam-RG multiple times to set multiple fields.
--sam-RG is ignored unless -S/--sam is also specified.

Bowtie2

SAM options:
--rg

Add (usually of the form TAG:VAL, e.g. SM:Pool1) as a field on the @rg header line.

e.g.:
--rg CN:nameofourgroup

[ewels]

Moved to nf-core