HDFStore object display is reduced in 0.12.0rc1 and slow for big files.
The store object does not display anymore the columns and data columns for me, but I don't know if this is design spec, I am just reporting a change of behavior, apologies if this is expected.

``` python
store = pd.HDFStore('/u/paige/maye/raid/rdr20_month_samples/nominal/C9.h5')

pd.__version__
'0.12.0rc1'

store
<class 'pandas.io.pytables.HDFStore'>
File path: /u/paige/maye/raid/rdr20_month_samples/nominal/C9.h5
/df            frame_table  (shape->390557601)
```

Also, when executing this in IPython it takes a lot of time (approx. 2 min), is IPython caching anything of this 390 mio lines object??
When using this path, it looks fine:

``` python
store.root.df.table.description
{
  "index": Int64Col(shape=(), dflt=0, pos=0),
  "values_block_0": Float64Col(shape=(13,), dflt=0.0, pos=1),
  "values_block_1": Int64Col(shape=(7,), dflt=0, pos=2),
  "values_block_2": StringCol(itemsize=12, shape=(2,), dflt='', pos=3),
  "clat": Float64Col(shape=(), dflt=0.0, pos=4),
  "clon": Float64Col(shape=(), dflt=0.0, pos=5),
  "cloctime": Float64Col(shape=(), dflt=0.0, pos=6)}
```
