Add missing std headers for compilation with VisualStudio 2013.

Additional C++11 support in VS12 requires inclusion of the proper headers.
Merge pull request #334 from Deledrius/vs_2013_std

Add missing std headers for compilation with VisualStudio 2013.
Merge pull request #333 from Mystler/readme

README update.

- Update Guild of Writers address.
- Enhance formatting in step-by-step instructions.
- Various other updates and typographical fixes.
Change README format to Markdown