3.0 - Query caching for \Cake\ORM\Table::get

I recently wanted to use query cache with wonderful `\Cake\ORM\Table::get` and found out, that it wasn't possible. Do you think something like this might be useful?

At first I was only considering this: https://github.com/sukihub/cakephp/compare/cakephp:3.0...sukihub:3.0-cacheable-get-v1 but having cache option available in find might be a little bit more useful.

I did not add test for `Query` class (`QueryTest::testApplyOptions`) since (1) the change there was trivial and (2) there is no easy way to check what's in `_cache` in `QueryTrait` other than actually "firing" the query with "real" cache. Should however work just fine. 

What do you think?
Instead of all this option handling, could you not just call cache() on the query before first() is called?