DataDots handles the case where ... is missing. closes #338
handle the case where ... is missing in filter. #338
handle the empty case in mutate
actually one of the tests expect filter to fail in the empty case
mv arrange in its own file
correctly handle NA in arrange. closes #331
arrange handles 0-rows data frames. closes #289
the weird character again
filter with no arguments returns the input
simpler output for summarise in the border case where no parameters are given. #338
not reordering columns in join. closes #328
no traverse_call initial substitution for anonymous functions. #305
mv vector_class in its own file, included before Gatherer which needs it
added test
Add memory vignette. Closes #198
Merge pull request #319 from hannesmuehleisen/master

dplyr <> MonetDB integration
Re-document
Process Garrett's comments
Export grouped_df
sum correctly overflow in the integer, na.rm = false case. closes #308