added capture_time_domain function to capture device
start splitting up gui/constants: remove unneeded import
gui.py: use units.M
gui/constants: remove gui init constants
fix init_rbw units
move plot widget constants to plot_widget
remove unnecessary import
removed ref level offset textbox
remove device "constants" from gui/constants
move trigger type constants to pyrf.config
move RBW_VALUES to the one module that needs it
move GUI labels to labels.py
gui colors in colors.py
pep8: uppercase class names
bug fixes
Merge remote-tracking branch 'wardi/master'
merged with new master
added ref/min level controls
added const/iq plots to gui
added safeguard triggers outside selected frequency