Dispatch mode for method_lookup subrequests

[Mike Rylander]

There is a pattern in the wild of using OpenSRF's method_lookup() facility to decide between one of several local methods when delegating to pre-existing logic. Often times, we want to simply hand control over to another method, but the output of a subrequest's run() is an array of results. The caller has to know if, and how, to restructure the result for the client.

Instead, we can now call dispatch() instead of run() and have OpenSRF session control completely passed to the delegate code. This way, the delegate code need not know anything about its caller, and vice versa.

Here's a branch that implements that:

http://git.evergreen-ils.org/?p=working/OpenSRF.git;a=shortlog;h=refs/heads/user/miker/respond_directly_mode

[Galen Charlton (gmc)]

Pushed to master, along with my usual documentation enhancements. Thanks, Mike!