Dataframes v0.11 is out

[tlnagy]

This is a pretty big change and we need make sure Gadfly works with it. I believe the main hangup right now is that RDatasets (which we use for tests) doesn't work with v0.11 until JuliaStats/RDatasets.jl#48 merges.

Then we'll need to drop DataArrays from REQUIRE and peg the minimum version of DataFrames at v0.11 and fix any problems.

[va-andrew]

Plus one for this issue. We had to remove Gadfly from our workflow until it can coexist with the newer versions of DataFrames (it currently forces a downgrade when used with Pkg).

[tlnagy]

Looks like JuliaStats/RDatasets.jl#48 is basically ready so we can bump our requirements once it's merged and a new release is tagged.

[tlnagy]

The work has moved to #1090

[andreasnoack]

I think this can be closed. Eventually, we might want to remove DataArrays as a dependency but it is not required.

[bjarthur]

happy to close this. you've done great work @andreasnoack ! thanks for taking on this important issue.

re. DataArrays... is it or is it not a dependency? should be removed now from REQUIRE if not.

[andreasnoack]

There is still code left to handle DataArrays if passed to Gadfly but I don't think we use them for anything so I suspect that it can be removed. I might take a look at that later today.