[omemo] Update CHANGELOG & manifest.ini

omemo/CHANGELOG

+2.3.4 / 2017-06-10
+- Bugfixes
+- Some Refactoring
+
 2.3.3 / 2017-06-09
 - Move encryption logic for files from the HTTPUploadPlugin to the OMEMOPlugin
 

omemo/manifest.ini

 [info]
 name: OMEMO
 short_name: omemo
-version: 2.3.3
+version: 2.3.4
 description: OMEMO is an XMPP Extension Protocol (XEP) for secure multi-client end-to-end encryption based on Axolotl and PEP. You need to install some dependencys, you can find install instructions for your system in the Github Wiki.
 authors: Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>
  Daniel Gultsch <daniel@gultsch.de>