Refactoring command lookup.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-blur
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-blur
Massive change to arguments in the new command platform.  Now arguments are passed by annotating fields on the commands themselves.  So therefore the Args object was removed.