Rename test modules
Add @data and @pdata macros
Extend @data and @pdata macros to handle non-array literals
Handle strings properly in @data and @pdata
Remove DataArray(scalar) function
Remove data* constructors
Test mixed literal data inputs
Revise tests to avoid DataVector[] interface
Remove dead utils
Remove deprecated PDA constructors
Clean up comment style in grouping.jl
Clean up dataarray.jl

Move code into datavector.jl and datamatrix.jl when appropriate
Alphabetize export list and remove functions
Remove no-op constructor
Return to setting NAs in similar

Fixes #10, #20, closes #21
Consolidate functionality under new array function

Remove matrix and vector
Remove failNA and replaceNA
Merge pull request #19 from JuliaStats/array

[WIP] Consolidate functionality under new array function
Clean up getindex and find, remove calls to replaceNA
Merge pull request #24 from garborg/master

Clean up getindex and find, remove calls to replaceNA
Fix convert methods for PDA's
comment out broken reference to DataFrame type