Merge pull request #115 from maxmind/dlieou/HHVM-wording

HHVM - wording; to clarify that HHVM is not required

Author: PatrickCronin

README.md

@@ -376,8 +376,7 @@ to the client API, please see
 
 ## Requirements  ##
 
-This library requires PHP 5.4 or greater. This library works and is tested
-with HHVM.
+This library requires PHP 5.4 or greater. This library is also compatible with HHVM. 
 
 This library also relies on the [MaxMind DB Reader](https://github.com/maxmind/MaxMind-DB-Reader-php).