Add additional functionality to the Sorcery API.

This commit adds native implementation support for copying and diffing objects,
as well as the ability to load or reload on a per-object type level.

Review: https://reviewboard.asterisk.org/r/2320/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@381134 65c4cc65-6c06-0410-ace0-fbb531ad65f3