Un-deprecate parseXEP0082Date

if the user knowns that the format *must* be XEP-82 (e.g. XEP-203
Delayed Delivery), then he should be able to decide to use this method
in order to avoid the extra XEP-91 matcher of parseDate().
jxmpp 0.2.0
jxmpp 0.3.0-alpha1-SNAPSHOT
Merge remote-tracking branch 'my/master'