Compute vector of loglikelihood ratio for data from ash fit
Return the vector of log-likelihood ratios of the data betahat, with standard errors betahatsd, for a given g() prior on beta, or an ash object containing that, vs the null that g() is point mass on 0
calc_vlogLR(g, data)
g: the fitted g, or an ash object containing gdata: a data object, see set_data