var subs not necessary. Simplicity wins
dead code
digest for lists of inputs.
a little aid to accelerate testing
ignore dir for test output
debug code slipped in
call the right version of a dply func
we are giving up on extention base and dplyr needs to wait until dplyr 0.3.0
.envir argument be gone! with new NSE
function to create data frame functions from vector funs
Name handling and fixes for VAR function