Also: - Fix the mfence patch to actually emit a memory barrier (bz 1288314). - Build an sse2 version for i386 for better performance on capable CPUs. - Enable use of C++0x features. - Drop out-of-date CHANGES.txt from git.
- Since the __TBB_full_memory_fence macro was function-call-like, it stole () intended for function invocation. GCC now warns about this.
- CHANGES.txt is now tracked in the git repo
