v0.0.61 Changed regionMatrix() so it can take the result of lapply(data, filterData, returnMean=TRUE) and thus (I believe) reduce the memory peak when using multiple cores. Changed filterData(), loadCoverage() and getRegionCoverage() to match the changes in regionMatrix(). Note that this means that getRegionCoverage() can now take as input a list where each element is produced by loadCoverage() including non-NULL 'cutoff'. Will proceed to test this version.