pipemeter - measure speed of data going through a pipe/redirection

Features:
- Shows speed of data moving from input to output
- Shows percentage complete if regular file specified
- Allows tuning of block size and display interval
- Support for dd style block size specification

Author:	Clint Byrum <cbyrum@spamaps.org>
WWW:	http://spamaps.org/pipemeter.php
