Website description shows that we can keep or random filename, but it was hard coded to random no matter what you supply.
Added ability for user to control size of random file name in case of naming method `random`
Merge pull request #65 from armababy/master

Image field naming option and length of random method
Removed duplicate $this->naming
Merge branch 'master' of git://github.com/FrozenNode/Laravel-Administrator
Remove test line accidentally left there