OnDemand login and custom field fixes:
- Login problems with JIRA OnDemand ("the server did not set session id")
- Better support for custom fields of type unknown to JIRA Client
- Cannot upload custom fields of type "date"
- Cannot update date-time custom field on JIRA earlier than 4.4: "wrong date format" with duplicate "h:mm a"
- Mac OS X 10.6 or later, or 10.5.2 or later with Java Updates