readme & package.json: update description

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>

README.md

@@ -3,8 +3,7 @@
 [![Travis Build Status](https://travis-ci.org/tessel/tessel-av.svg?branch=master)](https://travis-ci.org/tessel/tessel-av) 
 [![Coverage Status](https://coveralls.io/repos/github/tessel/tessel-av/badge.svg?branch=master)](https://coveralls.io/github/tessel/tessel-av?branch=master)
 
-USB Camera, Microphone, Player and Speaker API for Tessel 2
-
+USB Camera, Microphone, MP3 Player and Text Speaker support for Tessel 2.
 
 #### This module does not and will not support the Tessel 1 Camera Module
 

package.json

@@ -1,7 +1,7 @@
 {
   "name": "tessel-av",
   "version": "0.17.0",
-  "description": "Cross-platform audio record/playback and video recording.",
+  "description": "USB Camera, Microphone, MP3 Player and Text Speaker support for Tessel 2.",
   "repository": "https://github.com/tessel/tessel-av",
   "main": "lib/index.js",
   "scripts": {