tabifying event monitor and timeline widgets.
boilerplate code for non-pharmaceutical interventions.
filling in NpiWidget. implemented location types and region / county specification.
added age-specific effectiveness widgets to NpiWidget.
added location label.
NPI: added duration spin box, changed order of location type.
getting values from UI and validating results before disabling widget for modification.
hiding unneeded location checkboxes after validation.
saving parameters from NpiWidget in Npi.
added execution time as an Npi parameter.
added clear and get methods for Npis to Parameters. clearing Npis on data set change.
non-pharmaceutical interventions implemented for within-county contacts and travel-based contacts.
hiding betaScale parameter from UI.
hiding treatment window (chi) parameter from UI, since it must be fixed at 1 day for the current antivirals implementation.
inverted parameters: tau -> average latency period, kappa -> average asymptomatic infectious period, gamma -> average total infectious period.
transformed nu parameter -> case fatality rate (CFR).
bounded parameters for periods in days to between 0.1 and 10 days.
changed number of decimals shown in parameters widgets.
removed summary information from EpidemicInfoWidget.
removed StockpileWidget since it didn't show anything.