Fix unsafe undefined value as Anorm parameter
Simplify Iteratee.recover* methods; rename IterateeExeption to IterateeException
Remove volatile var from trampoline

Change variable names to make it clear that we don't need a
`var`. Use a match expression so that local.get's value isn't
in scope when it has a null value.
Merge pull request #3623 from richdougherty/misc-iteratee

Remove volatile var from trampoline; simplify Iteratee.recover* methods
Merge pull request #3616 from cchantep/anorm-3616

Anorm unsafe None
Deprecate passing None as Anorm parameter
Merge pull request #3627 from cchantep/anorm-deprecate-none

Deprecates passing None as Anorm parameter
Migration and highlights
Merge pull request #3621 from cchantep/play24-anorm-doc

Migration and highlights