changed required version of Openfire form 3.5.0 to 3.8.0
changed certificate path to "/usr/share/openfire/certificate.p12"
added exception handling for Push.combined(...)
Merge branch 'master' of github.com:phlogisto/OpenfireAPNS

Conflicts:
	apns/src/java/org/jivesoftware/openfire/plugin/apns/apns.java
	apns/src/java/org/jivesoftware/openfire/plugin/apns/pushMessage.java