Swift improvements

[MaddTheSane]

These improvements help make the Swift additions to CocoaLumberjack behave better, as well as fixing some bugs.

[bpoplauschi]

Looks good to me, but since I'm not yet a valid Swift practitioner, I will wait for @rivera-ernesto and @dvor to look at this PR. Anyway, @MaddTheSane thanks for working on this.

[rivera-ernesto]

Looks good @MaddTheSane !

By the way would you like to be a maintainer? Just by looking over Swift compatibility would be enough. Off course you could participate in any issue/pull request and we would continue to take a look at Swift as well.

[MaddTheSane]

I wouldn't mind being a maintainer, even if it is only over Swift code.

[rivera-ernesto]

Perfect! @robbiehanson could you add @MaddTheSane as a maintainer?

[bpoplauschi]

@robbiehanson could you respond to this, please?

[bpoplauschi]

@robbiehanson hey man, could you help us out with this? We should bring this guy on board.

[rivera-ernesto]

I don't think he gets any mentions' notification. We should try contacting him directly but I can't find a valid email address.

[robbiehanson]

could you add @MaddTheSane as a maintainer?

Added.

[rivera-ernesto]

Thanks @robbiehanson, it would be also good to have the permissions to freely add maintainers. I think GitHub has improved organization permissions, so you should be able to give us that permission while keeping owner privileges for yourself.