fmt='t' does not work for put and .to_hdf
``` python
import pandas as pd, numpy
df = pd.DataFrame(numpy.empty((10,10)))
df.to_hdf('testme.h5','data',fmt='t')
store = pd.HDFStore('testme.h5')
In [7]: store
Out[7]: 
<class 'pandas.io.pytables.HDFStore'>
File path: testme.h5
/data            frame        (shape->[10,10])

store.put('data1',df,fmt='t')
In [10]: store
Out[10]: 
<class 'pandas.io.pytables.HDFStore'>
File path: testme.h5
/data             frame        (shape->[10,10])
/data1            frame        (shape->[10,10])

store.append('data2',df)
In [12]: store
Out[12]: 
<class 'pandas.io.pytables.HDFStore'>
File path: testme.h5
/data             frame        (shape->[10,10])                                       
/data1            frame        (shape->[10,10])                                       
/data2            frame_table  (typ->appendable,nrows->10,ncols->10,indexers->[index])

In [13]: pd.__version__
Out[13]: '0.12.0'
```
