GH #14499 Panel.ffill ignores axis parameter and fill along axis=1
- [x] closes #14499, closes #8251
- [x] tests added / passed
- [x] passes `git diff upstream/master | flake8 --diff`
- [x] whatsnew entry

handle case where `axis=0`, tests added for every case and passed, whatsnew added
 ## [Current coverage](https://codecov.io/gh/pandas-dev/pandas/pull/14528?src=pr) is 84.65% (diff: 100%)
> Merging [#14528](https://codecov.io/gh/pandas-dev/pandas/pull/14528?src=pr) into [master](https://codecov.io/gh/pandas-dev/pandas/branch/master?src=pr) will increase coverage by **<.01%**

```diff
@@             master     #14528   diff @@
==========================================
  Files           144        144          
  Lines         51030      51039     +9   
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
+ Hits          43198      43208    +10   
+ Misses         7832       7831     -1   
  Partials          0          0          
```

> Powered by [Codecov](https://codecov.io?src=pr). Last update [8b497e4...5fdf296](https://codecov.io/gh/pandas-dev/pandas/compare/8b497e49387ad167acb1c8ae31d67676e30add5e...5fdf2960db1efb8f41ba0df9630038e6cf27f847?src=pr) @jreback you're okay with this pr ?
 @Tux1 can you rebase / update Done

> On 22 Dec 2016, at 07:09, Jeff Reback <notifications@github.com> wrote:
> 
> @Tux1 <https://github.com/Tux1> can you rebase / update
> 
> —
> You are receiving this because you were mentioned.
> Reply to this email directly, view it on GitHub <https://github.com/pandas-dev/pandas/pull/14528#issuecomment-268668173>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AGWku4E3Ck1ncZf0bkgZaE4sGggfblb0ks5rKbGpgaJpZM4KjmbC>.
> 

 pls comment if youd like to update / rebase and continue