Time to `pull` from `rtl_433` repository. Revise docs now that omni decoder is included in rtl_433 repository

If you've been using a custom-built rtl_433 in order to use an Omnisensor microcontroller, you can now pull in your cloned repository and deploy a fully-updated version of rtl_433 with all current drivers and with omni included (now protocol #377).

Be sure to save a copy of your customized omni.c code so you can reinstall it before building rtl_433

The revisions in this "Omnisensor" release are just to simplify the documentation. Since omni.c has been incorporated into the rtl_433 repository as device protocol #377, these docs no longer need to describe how to build your own decoder into rtl_433.

Python decoder example

This version incorporates the "omni.c" decoder for rtl_433 that will be incorporated into the mainstream rtl_433 repository. It is functionally the same as the earlier versions but complies with coding standards.

This version also includes Omni00.py as a model for end-consumer decoding of "fmt=0" (channel 0) messages from the microcontroller. That "pass-through" approach avoids the need to modify the "omni.c" decoder on your rtl_433 server but allows you to decode your microcontroller messages directly on the end-consumer system.

omnisensor_433

Initial release of Arudino IDE .ino code, rtl_433 decoder .c code, and README documentation that details how to build your own multi-sensor, rtl_433-compatible, microcontroller-based remote sensor.