HarlanH/DataFrames.jl — pull request #227 by kmsquire (2013-04-03 05:49:12+00:00)
Title: WIP: Added ref type parameter, `compact` to PooledDataFrame

* Allows the user to specify the reference type for PooledDataArrays
(default is still Uint16)
* Added `compact` to take an existing PooledDataArray and change the
reference type to the smallest size possible. Returns the same
PooledDataArray if nothing has changed, and a new one if the size
is reduced