Support for date formats (renderPropertyValue,xyz,Date)

[vankeisb]

We don't have built-in support for dates with time at the moment. In order to create a textfield for datetime, we currently have to basically rewrite it all :

• override renderPropertyValue for Date
• include formats in the stripes resources (for Type Conversion)
• specify the format (and type) in the <s:text> (for Formatting)
• use another date picker :/

Suport for format should be configurable for all skins (regarding the fact that you use a date picker or not), and in bootstrap3 at least, the picker should support date and time.