Implement composite rules, joined via and()

[bogsi17]

No description provided.

[codecholeric]

Thanks a lot 😃 Looks generally good, I've added some minor comments. Also as you can see, the tests have failed. These are ArchUnit's own ArchUnit tests 😉 that want that you add @PublicAPI to public methods you want to expose (it's mainly a check to remind developers to really think carefully about exposed API that we have to support for a long time). So if it's @PublicAPI(usage = ACCESS), public classes and methods should also be final (since the API is not intended for inheritance).

Also it would be great if you could check out https://github.com/TNG/ArchUnit/blob/master/CONTRIBUTING.md
In particular it's necessary that you sign off your commit (check 'sign-off' in IntelliJ or commit via git commit -s from the command line). Referencing the issue would be great, too!
Anyway, thanks a lot for contributing, I really appreciate it!! So I hope all those nagging little comments don't discourage you 😉

[codecholeric]

PS: Rebasing would be awesome, too 😉 I generally like a linear history where possible...

[bogsi17]

Hi, thanks for the feedback! Where can I find your comments? Can't see them in the 'Files Changed' section.

And yeah, I really should have read this document before :D

[codecholeric]

Ah sorry, I forgot to click "submit review" 😳

[codecholeric]

I've added support for priorities to CompositeArchRule, other than that, it looks good now 😄
Gonna merge it...