add readme file

README.md

@@ -0,0 +1,31 @@
+PHP IDN Punycode
+================
+
+Encode and decode IDN Punycode if not exists internal php functions `idn_to_ascii` and `idn_to_utf8`.
+Functions use algorithm by rfc 3492.
+
+[![Build Status](https://travis-ci.org/IgorVBelousov/php_idn.svg?branch=master)](https://travis-ci.org/IgorVBelousov/php_idn)
+
+**function EncodePunycodeIDN( $value )** string 
+
+Encode UTF-8 domain name to IDN Punycode
+
+Parameters: 
+
+string **$value** Domain name
+
+Returns: 
+
+Encoded Domain name
+
+**function DecodePunycodeIDN( $value )** string 
+
+Decode IDN Punycode to UTF-8 domain name
+
+Parameters: 
+
+string **$value** Punycode
+
+Returns: 
+
+Domain name in UTF-8 charset