Compatibility

Last test with v2.7.4 on 06/18/2018.

Example ESP8266 ESP82 M0 WiFi WICED Ethernet* FONA 32u4 MKR1000
00_publish ?
01_subscribe ?
02_pubsub ?
03_multiple_feeds ?
04_location ?
05_type_conversion ?
06_digital_in ?
07_digital_out X ?
08_analog_in ?
08_analog_out X ?