Modify Describe function
Modify Describe function

1) Print out NA count/percentage for all cases. It feels more
comfortable to have NA always printed out explicitly, rather than
having to assume that NA = 0. Also, calculated NA% to give context
about data completeness

2) Added unique count for character string scenario, to help user
determine whether column should be pdv or if column is a key (i.e. high
cardinality column for joins, as opposed to factor)

3) Fixed formatting for character case to remove colons to match
numeric table format

maximerischard/DataFrames.jl,campanja-forks/DataFrames.jl,tkelman/DataFrames.jl,armgong/DataFrames.jl,JuliaStats/DataFrames.jl,maximerischard/DataFrames.jl,emilbayes/DataFrames.jl,ccphillippi/DataFrames.jl,pwoolcoc/DataFrames.jl,anriseth/DataFrames.jl,niloynibhochaudhury/DataFrames.jl,tshort/DataFrames.jl,scls19fr/DataFrames.jl,zhmz90/DataFrames.jl,JuliaPackageMirrors/DataFrames.jl