1) Release retained _result property on dealloc().  2) Rename ThreadUtilsInvokeArgs private class to be inline w/ the invokeBlock() method it is used w/.
Update to a simpler self contained example that will work out of the box.
Update directory path to CouchbaseLite framework to be in '/Users/Shared'.
Merge https://github.com/couchbaselabs/couchbase-lite-titanium