slot configuration not completely implemented

[cuvoodoo]

this is more a status report from trying the project, since the README does not mention it. currently it is not possible to configure the IO boards on the slots.

cgi_config_ioBoards_config in webserver.cpp is actually implemented, and is reachable using an HTTP request (such as http://169.254.59.1/config/ioBoards/config.json?slot=0&boardType=3&port0dir=3&port0con=2&port1dir=3&port1con=2&port2dir=0&port2con=0&port3dir=0&port3con=0 , values are from boardconfig.h ), but the configuration is not reflected back (in the UI or functions).

currently 4 DMX outputs is hard coded and this can't be changed using the config.