extract-subsequence
----------

This script is used to extarct part of a fasta sequence from a file.


Parameters:

<file.fa>
	Input file in fasta format.

<offset>
	The offset form where to begin capturing the subsequence.
	
<length>
	The length of subsequence to caputre and return.

--contig <contig>
	The name of the contig from which to extract sequence from.
	Default is first contig in fasta file.

--fasta
	If specified returns the subsequence in fasta format.

