cut_out_fasta_multiple_from_one_chr: cut_out_fasta_multiple_from_one_chr
In markheron/pRon: pretty Representations of oligo-nucleotides

Cuts out multiple regions from a single DNAString(Set) (i.e. typically a chromosome).

1	cut_out_fasta_multiple_from_one_chr(pos, strand, size, order, chr_fasta)

`pos`	vector of central position for cuting out the region
`strand`	vector of "+"/"-" to specify if the forward or the reverse complement sequence shall be used
`size`	region size before and after the positions to cut out
`order`	what oligonucleotide order will later be used (to extend the cut region for symetry)
`chr_fasta`	DNAString(Set) of the chromosome from which to cut out the regions