XMPPElement To and From Methods
Move XEP-0203: Delayed Delivery to a Category on NSXMLElement not XMPPElement

XEPs such as 0313: Message Archive Management show that Delayed Delivery can be used for thins other than iq, presence and message elements.
Fixes iOS 6 Warnings for ServerlessDemo
XMPPStream Connect APIs now have optional timeout parameter

Fixes #59
Fixes #122
XMPPStream enumerateModulesOfClass: withBlock: API
XEP-0184
NSXMLElement xmlns prefix APIs
Rename BOOL
XEP-0059: Result Set Management
XEP-0297: Stanza Forwarding