add windows multi arch/version build script

scripts/build.bat

+@rem setup
+@rem git clone git://github.com/marcelklehr/nodist.git
+@rem create ~/.node_pre_gyprc
+@rem note, for 64 builds you may need to win7 sdk terminal
+@rem https://github.com/TooTallNate/node-gyp/issues/112
+set PATH=c:\dev2\nodist\bin;%PATH%
+set PATH=node_modules\.bin;%PATH%
+set PATH=%PATH%;c:\Python27
+
+@rem 32 bit
+set NODIST_X64=0
+nodist use stable
+node -e "console.log(process.version + ' ' + process.arch)"
+node-pre-gyp clean
+npm install --build-from-source
+npm test
+node-pre-gyp package publish
+node-pre-gyp clean
+
+@rem 64 bit
+@ rem cannot open input file 'kernel32.lib' http://www.microsoft.com/en-us/download/details.aspx?id=4422
+set NODIST_X64=1
+nodist use stable
+node -e "console.log(process.version + ' ' + process.arch)"
+node-pre-gyp clean
+npm install --build-from-source
+npm test
+node-pre-gyp package publish
+node-pre-gyp clean
+
+@ rem 32 bit v0.8x
+set NODIST_X64=0
+nodist use v0.8
+node -e "console.log(process.version + ' ' + process.arch)"
+node-pre-gyp clean
+npm install --build-from-source
+npm test
+node-pre-gyp package publish
+node-pre-gyp clean
+
+@rem 64 bit v0.8.x
+set NODIST_X64=1
+nodist use v0.8
+node -e "console.log(process.version + ' ' + process.arch)"
+node-pre-gyp clean
+npm install --build-from-source
+npm test
+node-pre-gyp package publish
+node-pre-gyp clean