Update copyright
Add .gitattributes
(cherry picked from commit cab7dc3b3345446e7253313c4506d14db6ce25ea)
Fix #10

Perform safe cast to ViewResultBase in SelectListActionAttribute.OnActionExecuted
because in some cases (ex. when exception has been thrown) result is EmptyResult 
(cherry picked from commit 27c1bc8aee1aa5bca7af6f4e5c9d80f204dc29a7)
Fix #11
(cherry picked from commit ee946d0d5035b36bedc61ce56a0a5bdb58a0eb25)
Increment version to 2.5.2

AssemblyVersion remains 2.5.1