Created DateTime Formater strategy for hydrator
Added filter as dev requirement
Fixed typo, added missing t
Create DateTime from format
Added method, 'setFilter'
Updated as advised by @Ocramius
Typehinting DateTimeFormatter instead of FilterInterface, as suggested by @danizord
Applied PHP-CS-Fixer
Used DateTime::RFC3339 as default date format
Merge branch 'feature/datetime-format-strategy' of https://github.com/ojhaujjwal/zf2 into feature/datetime-format-strategy
Return null on extraction if date is null
Update tests