added tests to ZeroWeightedDistributions, removed vector rand function cause it was wrong, but we don't use it in the simulations anyway

app dynamics and opinion dynamics done, I think? people seem to rapidly switch opinions which is probably wrong

merge IntervalsModel into CovidAlertVaccinationModel, dependecies are too tight to manage as too packages easily

removed LTC/HCW stuff, contact generation needs fixing, use bytearrays instead of bitarrays for weights

Seperated Zeroweighteddistributions into its own package, implemented WS/Rest functions, although fitting doesn't work too well yet