Add WEBDUINO_COMMANDS_COUNT macro
Add WEBDUINO_COMMANDS_COUNT macro

Add macro for configuring maximum number of commands that can be defined.
This macro replaces hardcoded "8" number.

fepblaster/Webduino,weese/Webduino,kasperkamperman/Webduino,m-mcgowan/Webduino,pbystrup/Webduino,kasperkamperman/Webduino,m-mcgowan/Webduino,meg23/Webduino