Change send/2 to return error if one occurs
Add XEP-0184 stanzas
Extend XEP-0184 capabilities
Fix 0184 groupchat and message types handling
Convert 0184 functions to #xmlel{}
Change 0184 predicates to follow standard
Merge pull request #11 from esl/xep0184-rebase

XEP-0184 - related functions