Added methods for working with Date component

[iPhosgen]

Added methods for working with Date component

[MrTanoshii]

I believe the build check failed because you forgot to add #include <time.h>

[CLAassistant]

All committers have signed the CLA.

[per1234]

Thanks for your pull request @iPhosgen. I don't think it is a good idea to add a function that returns an arbitrary ambiguous date format (DD.MM.YYYY) since this would only be useful to those who happen to prefer that format (unfortunately there is an inconsistency in how dates are formatted from one locale to another and from one individual to another), and potentially confusing to those who are accustomed to another format.

If such a function is to be added, it should either support returning the date in any user specified format as proposed in #94, or else use an ISO 8601 standard format as proposed in #119 and #195