Looks like you are having fine working with the soil....

Do a soil test before adding anything. Also, your plants like high or low PH?

Unless your pH is too acid, I wouldn't add any lime to the beds. I have clay soil very similar to yours and my raised beds seem to drain just fine. Sounds like you're going to have a great growing season next year.

Where in the United States are you? That can help provide good information.
Have a good reliable soil test done before adding any to that soil, if you do not add enough limestone nothing will happen.
If you add too much limestone you could make life very difficult for the plants you want to grow because they will not be able to use the nutrients they need to grow.
The current issue, December2014/January2015, of Organic Gardening magazine has a good article on soil drainage.