Remove "Nanopb" dependency as it's not an Arduino library

Has to be installed manually

README.md

@@ -1,5 +1,9 @@
 [![CLA assistant](https://cla-assistant.io/readme/badge/meshtastic/Meshtastic-arduino)](https://cla-assistant.io/meshtastic/Meshtastic-arduino)
 
-Driver for interfacing with Meshtastic nodes over WiFi and Serial connections
+Driver for interfacing with Meshtastic nodes over WiFi and Serial connections.
+
+Note: This is **not** the [Meshtastic firmware](https://github.com/meshtastic/firmware) for use on a supported device with LoRa chip.
+
+When using the Arduino IDE, install the Nanopb dependency as explained [here](https://www.dfrobot.com/blog-1161.html) under "Setting up the environment".
 
 Author: Mike Schiraldi

library.properties

@@ -1,10 +1,9 @@
 name=Meshtastic
-version=0.0.3
+version=0.0.4
 author=Meshtastic
 maintainer=Meshtastic <[email protected]>
 sentence=Driver for interfacing with Meshtastic nodes over WiFi and Serial connections
-paragraph=This library allows devices to send and receive information through the Meshtastic network via the WiFi or Serial interface of one of its nodes. Bluetooth integration is on the TODO list.
+paragraph=This library allows devices to send and receive information through the Meshtastic network via the WiFi or Serial interface of one of its nodes. Note: this is not the Meshtastic firmware itself.
 category=Communication
-depends=Nanopb
 url=http://meshtastic.org
 architectures=*