Updated simulated data for testing cell type adjustment methods

Different simulation scenarios on which to test cell type adjustment methods for epigenome-wide association studies.  Each .RData file contains a matrix of methylation beta-values from a simulated blood cell mixture "sim_beta", a list of simulated differentially methylated positions "dmr", and a phenotype "disease_status".  Updated version with new simulation scenarios.  Each of "simulated_data_many_assoc.tar.gz" and "simulated_data_few_assoc.tar.gz" contain 10 replications of those simulation scenarios.  The other .RData files represent only one replication of each scenario.