added: filter files from jnoisemeter, written by Fons Adriaensen
added: skeleton for noisemeter weighting ladspa plugin
added: wrapper code for weighting filters from Jnoisemeter (by Fons Adriaensen)
added: detect files from jnoisemeter, written by Fons Adriaensen
added: wrapper code for detection from Jnoisemeter (written by Fons Adriaensen)
added: audio switch ladspa plugin, will output 1 when the signal is above the threshold for some time, will output 0 when the signal is below the threshold for some time