Changes in version 1.2.1:
+ Update to RELEASE_3_18

Changes in version 1.0.2:
+ sample-specific covariates allowed

Changes in version 1.0.1:
+ bug fixed in vignettes (giving error: "there is no package called 'reticulate'")

Changes in version 1.0.0:
+ 1st version of the package
+ submitted to Bioconductor
