Author:         Martin Asser Hansen - Copyright (C) - All rights reserved

Contact:        mail@maasha.dk

Date:           February 2008

License:        GNU General Public License version 2 (http://www.gnu.org/copyleft/gpl.html)

Description:    Performs computations on records in stream.

Usage:          ... | $script [options]

Options:   [-e <string> | --eval=<string>]      -  Evaluate extression.
Options:   [-I <file>   | --stream_in=<file>]   -  Read input from stream file  -  Default=STDIN
Options:   [-O <file>   | --stream_out=<file>]  -  Write output to file         -  Default=STDOUT

Examples:   ... | $script -e 'CHR_BEG = 50'                 -  Set CHR_BEG to 50 in all records.
Examples:   ... | $script -e 'CHR_BEG = CHR_BEG - 50'       -  Substracts 50 from CHR_BEG in all records.
Examples:   ... | $script -e 'CHR_END = CHR_END + BED_LEN'  -  Adds BED_LEN to CHR_END in all records.