NAME
  	is_palindrome - check if string is a palindrome

SYNOPSIS
  	is_palindrome [string]

DESCRIPTION
  	Check if string is a palindrome.
  	Ignored characters: blanks, punctuation characters and digits.
  	The check is not case sensitive.

AUTHOR
  	Frida Hellden <frida@austinprkonsult.se>

LICENSE
  	http://www.gnu.org/licenses/gpl.html

EXAMPLES
  	Check if the string 'Sirap i Paris!' is a palindrome
  	./is_palindrome 'Sirap, i Paris!'
  	yes
  	./is_palindrome 'Retur och Retur'
  	no

DIAGNOSTICS
  	The is_palindrome utility exits
  	0 on success,
  	1 if called with invalid number of arguments.
  	2 if an unknown error happens

REFERENCES
  	http://docs.python.org/howto/regex.html