adding Log-Level control
only set root-loglevel and use delegation for the rest
getLogLevels() function that returns a sorted list of loglevelnames
test getLogLevels()
remove hardcoded values from debug-level selector
added /log/level OSC-message (docs)
switching loglevels via the GUI

TODO: make it work for the SMi's:
 - SMi should send current loglevel (int) in status-report
cmdline flag to set WILMix logfile
regenerated MIX/SM-config UIs
default /log/level
properly display SMi loglevel
setLevel() implementation that adds unknown lognames
make logger.setLevel() actualyl DO something
shorthand to get current logLevel()
use own getLevel() implementation
use function-pointers for speed

rather than wrapping one function into another, we make the
"wrapper function" a simple functor to the wrapped function
fixing syntax error
testing logger functionality
implement getLevel()...
allow to remotely set the log-level of SMi