paramsZIP: Zero-Inflated Poisson fit
In georgieevans/PrivacyUnbiased: Unbiased Estimates from Privacy Protected Data

Estimate via method of moments fit and paramaters of a ZIP distribution from DP data

1	paramsZIP(X, S, R, moments_df, plot_dp)

`X`	dp vector
`S`	dp noise added to obtain X
`R`	numbers of implied moments to fit
`moments_df`	estimated moments of Z
`plot_dp`	TRUE/FALSE value denoting whether to generate plot

Returns list of estimates:

`params`	Method of moment estimate of mean/variance of ZIP distribution
`moment_df`	Moments used to estimate params
`moment_fit`	Ratio of estimated moments to implied moments from paramaterized distribution
`moment_precision`	Ratio of moment mean to moment standard error
`plot`	Plot of fitted distribution