Some HipHop fixes:

Some HipHop fixes:
* Scan the C++ for volatile classes and show a warning with a list of them
* Fixed volatile classes Revision, CoreLinkFunctions and FileRepoStatus, made them non-volatile by patching the referring code
* Added some configuration for the build process to DefaultSettings.php.
* Split a few functions off MakeHipHop::execute()
* Only include UtfNormalDefines.php in interpreted mode, since in compiled mode, the constants exist from startup
* Apparently HipHop does not support set_exception_handler(). Added a try/catch block around the main part of index.php instead.
* Fixed ini_get() dependencies in Special:Upload. Upload now works, if you disable ZipDirectoryReader.