String-specific dtypes

General discussion
1

As seen in the “Notes” section about filtering by dtype, strings rely on ‘object’, but that’s not great because it’s kind of a catch-all.

2

Err, doesn’t look like I have permission to delete my post, but there is a string dtype now.

dtype = {
    'hour_object': 'string'
    , 'weekday_object': 'object'
    , 'kingdom_category': 'category'
    , 'doom_float64': 'float64'
    , 'radiance_float32': 'float32'
    , 'temperature_float': 'float'
    , 'moonday_int64': 'int64'
    , 'month_int32': 'int32'
    , 'color_uint8': 'uint8'
    , 'shape_int': 'int'
}
3 
>>> df['stringy'].unique().tolist()

AttributeError: 'StringArray' object has no attribute 'tolist'