Better handling of Clojure controller errors

[seancorfield]

This falls out of my work on fw1-clj in that the current code can't tell the difference between a Clojure controller that won't require / resolve due to syntax errors vs one that is missing.

[seancorfield]

The error handling was more robust than I realized but while trying to trigger various error conditions, I came across a couple of minor bugs around how Clojure controllers are created and some performance enhancements as well. I also enabled before() / after() methods on Clojure controllers. Now I have to check the documentation to see if I mention those don't work.

[seancorfield]

And the answer is "no" so based on those working with pure CFML FW/1 and pure Clojure FW/1, folks should expect them to work with mixed CFML / Clojure FW/1 and therefore this is just a bug fix and doesn't need documenting beyond that.