Minor Update to Table Showing Compiler Support for C++11

I just added coverage of enhanced enums (e.g., enum classes) and new alignment controls (alignof, alignas, std::aligned_storage and std::aligned_union) to my C++11 training course, and during the course of my research into and testing of those features, I made some minor updates to my summary table of C++11 support in gcc and MSVC.

The new slides will be included in the published version of my C++11 training materials the next time I push out a release.  Having recently done that, I don't expect the next release to go out for a while, but in the meantime, the information sources I refer to for enhanced enums and for alignment control in my C++11 training course are listed below.

Enhanced enums:

• “Strongly typed enumerations,” Wikipedia.  Subsection of entry for “C++11”.
• “enum class -- scoped and strongly typed enums,” Bjarne Stroustrup. Subsection of “C++11 – the recently approved new ISO C++ standard.”
• “Better types in C++11 - nullptr, enum classes (strongly typed enumerations) and cstdint,” Alex Allain.
• “C++0x Forward Enum Declarations Cut Down Compilation Time and Dependencies,” Danny Kalev, 13 August 2009.

Alignment Control:

• “Probe and Modify Your Types' Alignment Programmatically,” Danny Kalev, DevX.com, 10 July 2008.
• “alignas / alignof,” George Flanagin, 17 June 2011.

Scott