Fixes #421
Fixes #395
Updated XMPPMUC to include functionality for discovering rooms and services
Merge pull request #445 from jonstaff/master

Updated XMPPMUC to include functionality for discovering rooms and services (issue #444)
Added XMPPRegistration to handle XEP-0077
Added documentation
Fixes #450
Merge pull request #448 from jonstaff/xep-0077

XEP-0077 Added Functionality
Fixes #454
Added FileTransfer extension
Added XMPPNamespaces
Updated log levels
Bulletproofing the file transfer extensions
Merges #461

Fixes Warnings in Xcode Version 6.1 (6A1052d)
Rename XMPPNamespaces to XMPPConstants
Add support for NSSecureCoding
Merge remote-tracking branch 'upstream/master' into secure-coding
Merge pull request #470 from chrisballinger/secure-coding

Add support for NSSecureCoding
Universal Roster Item API

A Universal API for both Memory and Core Data Roster Storage for
getting information about a Roster Item:

- Subscription
- Ask
- Nickname
- Groups
Merge commit 'a902d2e9e84fff24636e0ec23ed1734967ae5837'