complex subsets syntax
Merge pull request #394 from garborg/doctypo

Doc typo - complex subsets syntax
Make readtable()'s "quotemark" argument a vector, remove "allowquotes"

Making "quotemark" a vector allows quite naturally to choose several
quoting characters (potentially useful for some weird files), and
disabling the use of quoting altogether by passing an empty vector.
This simple implementation does not take into account a possible
nesting of two different types of quote marks. This allows keeping
the performance impact low. Cf. issue #400.
Merge pull request #401 from nalimilan/quotemarks

Make readtable()'s "quotemark" argument a vector, remove "allowquotes"
Finished purge of DataArrays code. show(df) still fails
join() is broken
Merge pull request #403 from JuliaStats/purge

Remove DataArrays
Updates to sorting
Updates to sorting interface.
Merge branch 'sorting_update' of github.com:kmsquire/DataFrames.jl into sorting_update

Conflicts:
	src/dataframe.jl