Added support for Germany

[eaglefsd]

Not that familiar with open source and tests, if I'm missing something, just let me know!

[stelgenhof]

Although 'de' is an official locale, it is better to use a locale that identifies also the region as well. In this case 'de_DE' is preferred. Can you adjust your PR accordingly?

[stelgenhof]

Thank you very much for the PR @eaglefsd! Very much appreciated. I left a few comments on your PR.

Also as part of the unit tests, there should also be a Test.php (see for example Yasumi/tests/Finland/FinlandTest.php). This test contains tests to confirm all the holidays that you expect for this country.

In the future, I would like also to see the individual German States' holidays as they differ from the national ones; in the same way as done in Spain.

If you could review your PR based on my comments, I can merge it afterwards.

[eaglefsd]

Well, I used 'de' because you used it in the locales :)
But I can change it, sure.
Yes, good Friday is a day where the shops are closed, we even have a rule which forbids music in clubs.
I didn't have the time yesterday for the individual parts, but I will definetely have a look later today!

[eaglefsd]

Hi, I can commit the different states with their holidays, but I don't have the time to write the tests at the moment :/

[stelgenhof]

That would be great! I can do the unit tests for you. In that case I prefer you prepare the PR for just Germany without the state holidays first. I would like to do then a next update for the German state holidays.

[eaglefsd]

I removed the states in my latest commit, do I have to do anything else?
The translations for the state holidays (like epiphany) are still present tho, I hope you don't mind...

[stelgenhof]

Sounds good. I will merge it and if something needs to be altered we can do that.