install rsync and symlink /vagrant

scripts/rsync.bat

+rem install rsync
+if not exist "C:\Windows\Temp\7z920-x64.msi" (
+    powershell -Command "(New-Object System.Net.WebClient).DownloadFile('http://downloads.sourceforge.net/sevenzip/7z920-x64.msi', 'C:\Windows\Temp\7z920-x64.msi')" <NUL
+)
+msiexec /qb /i C:\Windows\Temp\7z920-x64.msi
+
+pushd C:\Windows\Temp
+powershell -Command "(New-Object System.Net.WebClient).DownloadFile('http://mirrors.kernel.org/sourceware/cygwin/x86_64/release/rsync/rsync-3.1.0-1.tar.xz', 'C:\Windows\Temp\rsync-3.1.0-1.tar.xz')" <NUL
+cmd /c ""C:\Program Files\7-Zip\7z.exe" x rsync-3.1.0-1.tar.xz"
+cmd /c ""C:\Program Files\7-Zip\7z.exe" x rsync-3.1.0-1.tar"
+copy /Y usr\bin\rsync.exe "C:\Program Files\OpenSSH\bin\rsync.exe"
+rmdir /s /q usr
+del rsync-3.1.0-1.tar
+popd
+
+msiexec /qb /x C:\Windows\Temp\7z920-x64.msi
+
+rem make symlink for c:/vagrant share
+mklink /D "C:\Program Files\OpenSSH\vagrant" "C:\vagrant"