Cleanup references to boards in some of the example and use the same boards through the examples. Other minot cleanups and make the text more generic and not specific to certain boards. Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Added BME280 (humidity and pressure sensor) sample documentation for guiding beginners. Signed-off-by: Aaron Tsui <aaron.tsui@outlook.com>