Add MRR support, read build configs, and other small changes

[zadr]

I was working on some stuff (over at https://github.com/zadr/textmate), and wound up making a bunch of changes to Xcode-editor, and, well, here they are.

The changes fall under four basic categories:

• Using MRR instead of ARC. This was originally done by adding calls to retain/release/autorelease, but, changed over to a set of macros instead, so code will compile in both modes. Sorry for some extra commits that this resulted in.
• Don't re-sort members in XCTarget, XCGroup or XCProject's -- to let items to be displayed in the same way as they are within Xcode.
• Add rudimentary, read-only support for build configurations. I don't think that it would be too hard to extend this to have support for writing build configs back into the project, however, it isn't something that I needed to do, so, I never got around to it.
• Miscellaneous changes, such as:

-- Add a target file for the (non-Xcode-based) build system that is used
-- Add a -rootGroups property, since there can be > 1 XCGroup at the root level (I think this solves issue #12).
-- Some caching of XCGroup's in XCProject.
-- Remove a bunch of logging that was kind of noisy, sorry.

I had also cherry-picked felixLam's commits in from expanz/master, but, I don't think that it will cause any problems, as they're already in master.

[jasperblues]

Hi Zach,

Nice work.

When did you work on this? I tried pulling, but got some conflicts.

[zadr]

According to the commit history, over the past two weeks or so. I'll merge with master again, and see how it goes. Sorry about that!

[jasperblues]

No worries.

I haven't done anything myself, but did get one pull request 10 days ago (not too big - it should be hard to resolve).

Thanks for your contribution, and look forward to trying out the new features in TextMate.

[zadr]

All merged, wasn't anything big, just git's algorithm getting confused.

[jasperblues]

Damn - it looks like tests are broken. I think this happened during the last pull request that I merged 10 days ago. (Was really busy so didn't have time to check). A linking problem in the project setup, or something. Will fix this tomorrow (finished for the day here), and then merge yours.

Thanks again for the contribution.

[zadr]

That could also be related to me changing the xcodeproj around while playing around with enabling/disabling ARC. It might be worth double-checking to make sure that all the targets are defaulting to the right things.

Also, on the note of tests, I should note that they don't currently run in 32-bit/MRR mode -- Kiwi library requires ARC/64bit, and, I wasn't up for converting that over as well! I don't think this will be a big problem, though. Its not like XE is doing anything crazy with pointers or signed bits.

[zadr]

Don't mean to pester, but, have you had a chance to look into this yet? Thanks again.