BUG/VIS: rot and fontsize are not applied to timeseries plots

In timeseries plot, ``rot`` and ``fontsize`` arguments are not applied properly.
- ``rot`` is not applied to minor ticklabels
- ``fontsize`` is completely ignored.
### Current Result
![figure_ng](https://cloud.githubusercontent.com/assets/1696302/3709379/7841977e-1454-11e4-8396-fc42e943d54a.png)

### After Fix
![figure_ok](https://cloud.githubusercontent.com/assets/1696302/3709380/7cc1037a-1454-11e4-9456-a9335907473b.png)