qt4 building on Mavericks using patches from the Qt code review

### Notes..

**Note that this PR is still a WIP and not yet ready for merging.  I was asked to make a PR, so here it is :-)**

Some API changes prevent Qt4 from compiling successfully on Mavericks (10.9).  The bug submitted to Qt is here:

* https://bugreports.qt-project.org/browse/QTBUG-32237

I've taken two patches mentioned in the bug report that fix this issue and patched the qt formula to incorporate them.  The patches are here:

* https://codereview.qt-project.org/#change,69325
* https://codereview.qt-project.org/#change,69328

There are two Homebrew issues where discussion on this has taken place, one which is open and one older one which is closed.  They are:

* https://github.com/mxcl/homebrew/issues/21000 (open)
* https://github.com/mxcl/homebrew/issues/21608 (closed)

### Help!

There are a couple of issues that still need to be resolved with this patch.  Any assistance will be appreciated:

1. The formula currently downloads an external dependency (a shared library) using cURL via `system`.  Is there a better way to do this?
2. On some machines (so far it seems only the new MacBook Pro and Air) the compilation fails with errors related to SSSE3 extensions.  I added a `--without-ssse3` flag for those people, but I'm not sure how to automatically incorporate that.