Cannot load variables in v0.4 that load fine in v0.3

[milktrader]

This is breaking tests on Quandl for current nightlies and when I tried loading in REPL I likewise got this error

julia> load(Pkg.dir("Quandl/test/response.jld"))["missing"]
WARNING: type JLD.AssociativeWrapper{Core.String,Core.String,Base.Dict{Core.String,Core.String}} not present in workspace; reconstructing
WARNING: type Core.String not present in workspace; interpreting array as Array{Any}
WARNING: type Core.String not present in workspace; interpreting array as Array{Any}
ERROR: `convert` has no method matching convert(::Type{Dict{AbstractString,AbstractString}}, ::##JLD.AssociativeWrapper{Core.String,Core.String,Base.Dict{Core.String,Core.String}}#12109)
 in jlconvert at /Users/Administrator/.julia/v0.4/HDF5/src/jld_types.jl:406
 in read_scalar at /Users/Administrator/.julia/v0.4/HDF5/src/JLD.jl:359
 in read at /Users/Administrator/.julia/v0.4/HDF5/src/JLD.jl:331
 in read at /Users/Administrator/.julia/v0.4/HDF5/src/JLD.jl:316
 in anonymous at /Users/Administrator/.julia/v0.4/HDF5/src/JLD.jl:978
 in jldopen at /Users/Administrator/.julia/v0.4/HDF5/src/JLD.jl:237
 in load at /Users/Administrator/.julia/v0.4/HDF5/src/JLD.jl:977

[milktrader]

milktrader/Quandl.jl#74

[mbauman]

Thanks for the report. Looks like we'll need a switch for AbstractString like that for UInt (https://github.com/timholy/HDF5.jl/blob/efbb3f636bbb477b48ae60dceee80ef0d5e7ec9c/src/JLD.jl#L14-L18). I probably won't have time to fully test a solution for a few days, but I can do this if nobody beats me to it.

[timholy]

@mbauman, how about this for a deal: I'll solve this one, but if you haven't dealt with #203 (comment) I'd love to have that done sooner rather than later. Related: #211, although we should figure out how to implement that one.

[mbauman]

Deal. :)

[musm]

stale