* Automatically set mqtt buffer size
Current versions of pubsubclient allows the buffer size to be set
dynamically: https://github.com/knolleary/pubsubclient/pull/282
We can take advantage of this to avoid having to modify one of the
dependencies and instead automatically up the buffer size when a
powerful board is detected.
change link to sources
add credits and some shape for readme
add cleargrass with air pressure and mi band
add PWA
add plugins
Add new boards
improve doc with boars and ble devices
Jens Balvig