Added CiviCampaign Petition tokens, some cleanups

5.1

Update info.xml

Added CiviCampaign Petition tokens, some cleanups

5.0

updated version info

adjusted assumptions about prefixes, public events

Make no assumptions about gender if gender field and prefix is not filled in.

Allow tokens for private events (only impacts tokens with an event id)

4.1

Updated prefix and gender issue reported. Also addressed private event issue

3.0

Update for version 4.5