OMEMO / Axolotl Support

Support for OMEMO/Axolotl XMPP Encryption

"OMEMO is an XMPP Extension Protocol (XEP) for secure multi-client end-to-end encryption. It is an open standard based on Axolotl and PEP which can be freely used and implemented by anyone."

Overview: http://conversations.im/omemo/

Draft XEP: http://conversations.im/xeps/multi-end.html http://conversations.im/xeps/omemo-filetransfer.html