DNT v3.0.1 minor formatting changes

DNT v3.0.1 has only one minor change.

I've changed the labeling of observed devices from "model"/"channel"/"id" to "model"/"id"/"channel" to align with the standard precedence for identifying devices (https://github.com/merbanan/rtl_433/blob/master/docs/DATA_FORMAT.md ). The README file has been changed to reflect that reversal in the label.

I've also include a Python program, stream, that can be used to test for HTTP streaming service from the rtl_433 server.

DNT v3 adds HTTP streaming

v3 of DNT adds HTTP streaming as a communication protocol in addition to the prior MQTT option.

v2.3 adds paho-mqtt v1/v2 workaround

v2.3 of DNT adds a work-around for the paho-mqtt v1/v2 callback incompatibility created in the v2 release.

Scrollable display, with device alerts

V2.10 is a significant rewrite of v1 with the following major new features:

• Fahrenheit or Celsius temperature display
• Scrollable display window to accommodate longer lists of thermometers
• Warning column to display device alerts
• Easier installation and configuration
• Command-line or environment specification of parameters

Minor corrections in README

Correct some minor typographic errors in the README.md

Display Neighborhood Temperatures via rtl_433

Initial release of code and installation documentation