DOC: set_option docstring
Warning. NIt-picky here.

Parking this here as I see it's not quite just a simple edit of a docstring. Might have time for a PR today. This is the current partial docstring of `set_option`. Maybe it's just me, but my eyes have a very hard time finding the actual parameters in here as it doesn't quite conform to the numpy docstring standard and the lines are not 79 characters so they wrap on my terminal (not obvious in the below but tough to grok in the terminal). Any else find this hard to read? Any thoughts on a better format? I think fixing the line lengths, moving the types to the same line as the option, and moving the default/currently to a new indented line at end of the description would go a long way.

```
display.chop_threshold: [default: None] [currently: None]
: float or None
        if set to a float value, all float values smaller then the given threshold
        will be displayed as exactly 0 by repr and friends.
display.colheader_justify: [default: right] [currently: right]
: 'left'/'right'
        Controls the justification of column headers. used by DataFrameFormatter.
display.column_space: [default: 12] [currently: 12]No description available.

display.date_dayfirst: [default: False] [currently: False]
: boolean
        When True, prints and parses dates with the day first, eg 20/01/2005
display.date_yearfirst: [default: False] [currently: False]
: boolean
        When True, prints and parses dates with the year first, eg 2005/01/20
display.encoding: [default: UTF-8] [currently: UTF-8]
: str/unicode
        Defaults to the detected encoding of the console.
        Specifies the encoding to be used for strings returned by to_string,
        these are generally strings meant to be displayed on the console.
display.expand_frame_repr: [default: True] [currently: True]
: boolean
        Whether to print out the full DataFrame repr for wide DataFrames across
        multiple lines, `max_columns` is still respected, but the output will
        wrap-around across multiple "pages" if it's width exceeds `display.width`.
display.float_format: [default: None] [currently: None]
: callable
        The callable should accept a floating point number and return
        a string with the desired format of the number. This is used
        in some places like SeriesFormatter.
        See core.format.EngFormatter for an example.
display.height: [default: 60] [currently: 60]
: int
        Deprecated.
        (Deprecated, use `display.max_rows` instead.)
```
