Rename functions:

coltypes -> types
colnames -> names
clean_colnames! -> cleannames!

Replace use of earliest_common_ancestor with typejoin
Merge pull request #469 from JuliaStats/jmw/dfprops

[WIP] Rename coltypes, colnames and clean_colnames
Fix bug when showing large row ID's
Escape quotemarks that occur inside of strings when printing DF's
Use Type instead of DataType.
Merge pull request #477 from dcjones/master

Use Type instead of DataType.
Rename Stats to StatsBase
Make column summary 100x faster for very large DataFrames.
Update to new DataArray constructors
Update doc example code
Merge pull request #478 from garborg/master

Update doc example code
Use @~ macro for formulas
Fix formula bug
Move non-essential functionality to prototypes directory
Merge pull request #483 from JuliaStats/jmw/purge

Move non-essential functionality to prototypes directory
Update docs
Add PDA doc section in proper place
Merge pull request #476 from JuliaStats/jmw/escape

Escape quotemarks that occur inside of strings when printing DF's
Fix show() and drop dead utility functions
Stop treating DataFrames like matrices