Added millisecond format to datetime formats.
Merge https://github.com/mlaitinen/InvientCharts

Conflicts:
	invient-charts/src/main/java/com/invient/vaadin/charts/InvientChartsConfig.java
	invient-charts/src/main/java/com/invient/vaadin/charts/InvientChartsUtil.java
	invient-charts/src/main/java/com/invient/vaadin/charts/widgetset/client/ui/VInvientCharts.java