added trace controls to gui
finished adding multiple traces, removed pause function
began adding marker controls
grouped all trace attributes, added min hold
attenuator setting back to 1/0
wsa5000 decimation max 1024
sweep_read for 4k/5k
sweep_add only use settings supported by device
numpy_util: handle differen vrt data formats
numpy_util fixes
numpy_util: better I-only FFT
WSA.errors(): query+flush errors
WSA.rfe_mode() method
parse VRT data trailer flags
marker combo box now updates properly when a trace is enabled
fixed marker click bug, selected marker is now yellow, markers can now be set to different traces, window is resized based on user's screen
added wsa5k detection to discovery
move discovery message, port into pyrf
parse_discovery_response function
update twisted discovery