Add some special flags for building with clang/.
Webkit fixups for clang, newer autoconf, and out-of-source builds.
Fix namespace error in ragel-6.8.
Work around libunistring compilation issue with clang
Set -isysroot on CPPFLAGS

So that preprocessor-only configure tests get the right includes.
Distribute bogus xcrun

Add this to Xcode3/usr/bin so that tools like codesign work correctly on
Mavericks.
Carry ICU in all modulesets, updated to latest version, and patched for clang.
Patch enchant to correct gsize->size_t implicit cast errors.