OF-324 Offline Email Notification Plugin

unsupported plugin provided by Nicholas Mossie
	Resolve exception
		org.jivesoftware.util.CertificateManager - Error decoding subjectAltName
		java.lang.ClassCastException: org.bouncycastle.asn1.DERTaggedObject
		cannot be cast to org.bouncycastle.asn1.ASN1Sequence
Merge pull request #108 from wmz7year/fixCertificateManager

Update CertificateManager.java
Merge pull request #103 from akrherz/of324

OF-324 Offline Email Notification Plugin
Merge pull request #1 from igniterealtime/master

synchronized project