initial tvos support and demo app target

[sherbondy]

(Resubmitting with history squashed into single commit)
Please test!

I don't think I introduced any regressions (tried on both iOS and tvOS targets after making the changes), but xcodeproj files are a bear, so please let me know if I accidentally tweaked something that causes the file to no longer open in an older version of Xcode that you're interested in continuing to support.

GCDWebServer v3.3 landed about a week ago, noticed on Monday, and finally got around to building the demo app target for tvOS.

Reusing the same AppDelegate source code from the original demo app.

Thanks,
Ethan

[mfikes]

Another error I get when attempting to run the Ambly Demo TV target is an inability to link to the Ambly pod, it appears:

ld: library not found for -lAmbly
clang: error: linker command failed with exit code 1 (use -v to see invocation)

[sherbondy]

Eek, dunno how Info-TV.plist got lost in the fray. Will try to resubmit first thing tomorrow.

[sherbondy]

Heh, okay, the missing assets are in. I guess I just got trigger-happy yesterday and completely neglected to add the new files to the commit.

[sherbondy]

As far as the linker error, if you ever encounter that again, I think a fresh pod install might fix that.

[mfikes]

@sherbondy The Info-TV.plist issue has now been resolved, but I can't get the linking bit to work (I tried pod install.)

What I'm doing is getting the patch from this PR (via https://github.com/omcljs/ambly/pull/115.patch) and applying it to a fresh clone, and trying it out. The iOS demo app links and runs but not the tvOS demo app.

[mfikes]

Info-TV.plist is listed under Build Phases > Copy Bundle Resources for the Ambly Demo target (the non-tvOS target). I bet it causes no issue but is also probably caused by this line here.

[mfikes]

I think the root problem with the linking has to do with the target specifiers in the Podfile. If remove the conditional blocks simply specify platform :tvos, '9.0', then things work, and actually start working on my Mac for subsequent attempts without making this change. (This state fulness probably explains why you don't see it.) I've gone to another Mac and I see that it shows the same issue.

Also, I'm seeing that discovery doesn't work until I restart the app (happens to iOS and tvOS), which may be related to GCDWebServer 3.3.

Given this funkiness, I've put your patch in a tvos branch were these subtle issues can be ironed out before fully merging in, but where people can also try things. Your patch is in here c7caf85

I'll close this PR manually.