Snappy v1.1.6:

This is a re-release of v1.1.5 with proper SONAME / SOVERSION values.

Snappy v1.1.5:

This release has broken SONAME / SOVERSION values. Users of snappy as a shared
library should avoid 1.1.5 and use 1.1.6 instead. SONAME / SOVERSION errors will
manifest as the dynamic library loader complaining that it cannot find snappy's
shared library file (libsnappy.so / libsnappy.dylib), or that the library it
found does not have the required version. 1.1.6 has the same code as 1.1.5, but
carries build configuration fixes for the issues above.

  * Add CMake build support. The autoconf build support is now deprecated, and
    will be removed in the next release.

  * Add AppVeyor configuration, for Windows CI coverage.

  * Small performance improvement on little-endian PowerPC.

  * Small performance improvement on LLVM with position-independent executables.

  * Fix a few issues with various build environments.

(adam)