2.2.2 is out
fixing the tempdir option
delay call to tempdir to avoid non existing dir issue
align rmr.options default with package defaults
workaround for rbind.fill dropping rownames
no clobber behavior in both backends
much simpler workaround for rbind.fill limitations
don't use f for file variables
added dfs.rmr and dfs.mv. Preparation for #61 and RevolutionAnalytics/plyrmr/3
fixes #61
merge from master