Fix versioning scheme.

* Remove redundant number following revision.
* Fix incorrect version in nightly packages in CI.
* Fix nightly package publish failure in CI.

Add skip_tags to appveyor-release.yml.

Update mpu.exe.

Update versions, notes, and tools.

Update version info.

Update version info.

Update version info.

Update mpu.exe

Fix mpu.exe path problem. Issue msgpack#125.

Because csproj file use back slashes instead of forward slashes to represent file path, copying non-Windows environment always fails. This commit normalize the file path with Path.DirectorySeparatorChar.

Update versions.