[boost] [mpl] Can I merge pull requests for 'develop' into 'master' for Boost 1.56

Eric Niebler has issued a couple of pull requests for MPL on 'develop' involving VC++ and the has_xxx functionality which I have merged to 'develop' after testing them locally and successfully with various versions of VC++ from VC8 to VC12. The earlier already cycled through regression tests successfully but the latest was merged just recently. The latest involves a change for the NVidia CUDA compiler, for which I see no regression testing. I have not tested this change with the CUDA compiler ( is there even a Boost Build toolset for this compiler ? ) but I implictly trust Eric's judgment. Can/should these changes be merged to 'master' for 1.56 ?