Re-add the release script still used by appveyor.

scripts/release.bat

@@ -0,0 +1,38 @@
+@ECHO OFF
+
+REM ---------------------------------------------------------------------------
+REM Batch file for implementing release flow for solidity for Windows.
+REM
+REM The documentation for solidity is hosted at:
+REM
+REM     https://solidity.readthedocs.org
+REM
+REM ---------------------------------------------------------------------------
+REM This file is part of solidity.
+REM
+REM solidity is free software: you can redistribute it and/or modify
+REM it under the terms of the GNU General Public License as published by
+REM the Free Software Foundation, either version 3 of the License, or
+REM (at your option) any later version.
+REM
+REM solidity is distributed in the hope that it will be useful,
+REM but WITHOUT ANY WARRANTY; without even the implied warranty of
+REM MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+REM GNU General Public License for more details.
+REM
+REM You should have received a copy of the GNU General Public License
+REM along with solidity.  If not, see <http://www.gnu.org/licenses/>
+REM
+REM Copyright (c) 2016 solidity contributors.
+REM ---------------------------------------------------------------------------
+
+set CONFIGURATION=%1
+set VERSION=%2
+
+set "DLLS=MSVC_DLLS_NOT_FOUND"
+FOR /d %%d IN ("C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Redist\MSVC\*"
+    "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Redist\MSVC\*") DO set "DLLS=%%d\x86\Microsoft.VC141.CRT\msvc*.dll"
+
+7z a solidity-windows.zip ^
+    .\build\solc\%CONFIGURATION%\solc.exe .\build\test\%CONFIGURATION%\soltest.exe ^
+    "%DLLS%"