• Corrected formatting to be compliant with the Google C++ Style Guide.
• Specifically export the WriteBatch::Handler inner class for Windows link.
• Merge pull request #665 from cheng-chang:coding.
• Merge pull request #669 from pavel-pimenov:fix-readme-windows-mkdir.
• Merge pull request #472 from zhoudayang:patch-1.
• Merge pull request #339 from richcole-at-amazon:master.
• Restore soname versioning with CMake build.
• Other miscellaneous cleanups, fixes, and improvements.