first commit
Added the actual .pl file, made the README non-blank
Did 'git add' on the README this time
Not everyone uses #!/usr/bin/perl

    Instead give the user choice by picking whatever perl is first in
    their PATH
Declare all variables
use strict and use warnings to tell you about tons of mistakes
Since we're not reading in the file, there's little point in actually opening it

    This also avoids using a global name for a filehandle which can
    cause annoying action-at-a-distance errors
Since $_ is used a lot over a lot of lines of code, name it for clarity
print + exit is just die
Don't match each tag twice, just match it once and assign

    This also fixes possible subtle errors with tags like <errnest>
    clearing out your variables
No need for these temporary variables at all, actually
I prefer next over else. less indentation = better than
Warnings go to stderr not stdout
There's little value in using an incomprehensible variable name like this
Make the constant's nature a little more obvious
Little point in quoting a variable, it's just noise
Symmetry looks nicer even though it's more characters
Expanded the README a little.
Fixed a missed variable name change in the script.
Changed the project name, in partial deference to jawbroken
git added the newly-named script file