Fixed saddle horse
Added extra line
Improved horse saddling [SEE DESC]

Now it checks if horse is already saddled, and if it's, you don't lose the saddle. Also, if the horse isn't tammed, you can't saddle it.
More fixes

- You can only tame horses with nothing at hand
- Fixed rearing
Moved lines

don't know if I did well
Merge pull request #259 from tonibm19/patch-2

Fixed horse saddle