updated readme

README.md

 # LSL streams visualization
 
-This python script visualizes all channels of selected LSL inlets in separate plots for quick verification of signal integrity.
+A basic QT interface:
+* lists available LSL inlets 
+* can individually enable the plots of each inlet (all channels of the selected inlet will be plotted)
+* plot each channel of a given data inlet in a separate plot
+* all Marker Inlets are plotted on one plot
+* a button to update the inlet list
+
+This code has been edited from the ReceiveAndPlot example available at https://github.com/labstreaminglayer/liblsl-Python/tree/master/pylsl/examples 
 
 ## Requirements