Fix XML format for failing tests
Make field_URI build more flexible
Add TravisCI config
Add build status to the README
Remove JRuby from TravisCI build.
Add iso8601_duration_to_seconds to StringUtils
Add duration_in_seconds to CalendarItem
Reformat CalendarItem params, make start/end return DateTime
Test CalendarItem#duration_in_seconds
Add better default types to collections. i.e. [] instead of nil
Merge branch 'dan/better-default-types'