ui.MainWindow.set_control: fixed bug in update of run_precision
regenerated example data
analysis.dist.normgamma.h_step: fixed documentation
ui.MainWindow: 'Edit Priors' -> 'Set Priors'
ui.MainWindow.update_priors: reset posterior after updating prior
refactored ebfret.data -> ebfret.io
Added ebFRET wrapper
changes to reported statistics:

1. we now report lower bounds
2. we now report analysis for all numbers of states