update to newer quick check
print method seems to have trouble with an empty input

empty input
avoid creating col deficient df

when keys are present but values are 0 col
data frames
Nas don't compare as you think
ignore pkg check work dir
align with code
formatting
always return dfs
needs Curry
close the backend loop
test of set operations should discard duplicated elements
merge from master + conflict resolution in make.task.fun

Merge branch 'master' into dev

Conflicts:
	pkg/R/pipe.R