Support for iCal4j v4

[benfortuna]

As we get closer to adopting v4 as the main branch of iCal4j, support will gradually be added the other libraries.

The table below lists the latest versions that use iCal4j v3, as well as identify existing support for v4.

Library	iCal4j v3	iCal4j v4
ical4j-vcard	1.0.7	2.0.0-alpha3
ical4j-zoneinfo-outlook	2.1.2	2.1.3
ical4j-connector	1.0.5	2.0.0-alpha1
ical4j-serializer	0.1.6	0.2.0
ical4j-extensions	1.0.5	2.0.0-beta1
ical4j-integration	0.1.2	0.2.0

[benfortuna]

See the website for the latest project coordinates: http://www.ical4j.org/getting-started/