plyrmr users should be on the latest rmr2

because they are on the bleeding  edge anyway and it will help with
testing if we reduce the variability
ready for BARUG
assignment introduced later
example duplicates later one
html version for good measure
more detail on everything and withold .vectorized
delay .vectorized and fast.summary feature, there is a better way most likely
fixes a corner case with .columns
refresh
reclassfied one bug as feature and vice-versa