Rename IPN_PHP.txt to paypal_ipn.php
Rename IPN_PERL.txt to paypal_ipn.pl
Rename IPN_COLDFUSION.txt to paypal_ipn.cfm
Rename IPN_ASP_NET_VBS.txt to paypal_ipn.asp
Rename IPN_ASP_NET_VB.txt to paypal_ipn.vb
Update README.md

fixed some typos/grammar
Merge pull request #12 from ppmtscory/master

Update IPN Samples