add doc_info processor for showing usernames in case detail
update to pretty-user-display branch of casexml
Merge branch 'master' into pretty-user-display

Conflicts:
	submodules/casexml-src
remove code that's no longer used
Merge branch 'master' into pretty-user-display

Conflicts:
	submodules/casexml-src
Merge pull request #3432 from dimagi/pretty-user-display

add doc_info processor for showing usernames in case detail