tweaking build scripts

build.cmd

@@ -1 +1 @@
-%SYSTEMROOT%\Microsoft.NET\Framework64\v4.0.30319\msbuild.exe "%~dp0\B2Uploader.sln" /p:OutputPath="%~dp0\bin"
+%SYSTEMROOT%\Microsoft.NET\Framework64\v4.0.30319\msbuild.exe "%~dp0\B2Uploader.sln" /p:OutputPath="%~dp0\bin64"

buildx86.cmd

@@ -0,0 +1 @@
+%SYSTEMROOT%\Microsoft.NET\Framework\v4.0.30319\msbuild.exe "%~dp0\B2Uploader.sln" /p:OutputPath="%~dp0\bin"