Update all batch files to use MSBuild 14

BuildTools/buildAndCreatePackage.bat

@@ -1,6 +1,6 @@
 @echo This script simulates what the build server is doing
 @rem  /p:AdditionalBuildProperties="/v:d /p:MSBuildTargetsVerbose=true"
-%windir%\microsoft.net\framework\v4.0.30319\msbuild Automated.proj /p:ArtefactsOutputDir="%CD%\build" /p:TestReportsDir="%CD%\build"
+"%ProgramFiles(x86)%\MSBuild\14.0\Bin\msbuild.exe" Automated.proj /p:ArtefactsOutputDir="%CD%\build" /p:TestReportsDir="%CD%\build"
 @IF %ERRORLEVEL% NEQ 0 GOTO err
 @exit /B 0
 :err

debugbuild.bat

@@ -1,7 +1,7 @@
 @if not exist "AvalonEdit\ICSharpCode.AvalonEdit.sln" (
 	git submodule update --init || exit /b 1
 )
-%windir%\microsoft.net\framework\v4.0.30319\msbuild /m ILSpy.sln /p:Configuration=Debug "/p:Platform=Any CPU"
+"%ProgramFiles(x86)%\MSBuild\14.0\Bin\msbuild.exe" /m ILSpy.sln /p:Configuration=Debug "/p:Platform=Any CPU"
 @IF %ERRORLEVEL% NEQ 0 GOTO err
 @exit /B 0
 :err

releasebuild.bat

@@ -1,7 +1,7 @@
 @if not exist "AvalonEdit\ICSharpCode.AvalonEdit.sln" (
 	git submodule update --init || exit /b 1
 )
-%windir%\microsoft.net\framework\v4.0.30319\msbuild /m ILSpy.sln /p:Configuration=Release "/p:Platform=Any CPU"
+"%ProgramFiles(x86)%\MSBuild\14.0\Bin\msbuild.exe" /m ILSpy.sln /p:Configuration=Release "/p:Platform=Any CPU"
 @IF %ERRORLEVEL% NEQ 0 GOTO err
 @exit /B 0
 :err