Started working on payment/billing/checkout support
WIP on news publication date with tenant timezone
Convert iso date with TZ to local date in client
Remove unused tests
Make timezone configurable
Temporary fix timezone of date send by client
Add a custom iso8601 deserializer

TODO: Refactor to put deserializer in proper module
Serialize DateTime without millis; add a test
Comtinue checkout/payment work
Merge branch 'master' into payment-support
Finish merge
Regroup jackson DateTime ser/deserializer
Remove jackson joda module; not used for now
Merge branch 'master' into newsPublishDate

Conflicts:
	cms/pages/src/main/java/org/mayocat/cms/news/api/representations/ArticleRepresentation.java
Continue checkout/payment work
Continue billing/checkout/payment work
Add json tzdata and java tools to generate it
Fix TimeZoneList regex; update the list
Use timeService to populate tz choice dropdown
Use Strings.isNullOrEmpty