README.md in mml2wav-0.0.2 vs README.md in mml2wav-0.0.3

- old
+ new

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 # mml2wav [![Gem Version](https://badge.fury.io/rb/mml2wav.svg)](http://badge.fury.io/rb/mml2wav)
 
-MML (Music Macro Language) to WAV audio converter by Ruby.
+MML (Music Macro Language) to WAV audio converter by pure Ruby.
 
 ## Dependencies
 
 * [jstrait/wavefile](https://github.com/jstrait/wavefile)
 