deprecate readtable & writetable for CSV.read & CSV.write

[cjprybol]

a find & replace of DataFrame -> DataTable project-wide for each was sufficient to get those working.

• DataStreams.jl
  • issue Add new branch for DataTables? DataStreams.jl#27
  • ready branch https://github.com/cjprybol/DataStreams.jl/tree/cjp/DataTables
• CSV.jl
  • ready branch https://github.com/cjprybol/CSV.jl/tree/cjp/DataTables

after those changes we'll deprecate

• readtable in favor of CSV.read
• writetable in favor of CSV.write

I've seen this discussed but couldn't find an open issue

[nalimilan]

Cc: @quinnj

[deyandyankov]

I just want to point out that writetable and readtable are still in the online docs but are not defined in the module (or module docs). Perhaps the online documentation needs to be rebuilt?

[nalimilan]

Indeed, there's an error when building the manual: ERROR: LoadError: 'man/io.md' is not an existing page!. That reference should be removed from the files.

[nalimilan]

See #71.

[cjprybol]

#26