[skip ci] a command file that would build sqlite3 for node-webkit

scripts/build_for_node_webkit.cmd

+node-pre-gyp clean
+npm install nw-gyp
+cinst wget 7zip.commandline
+wget http://dl.node-webkit.org/v%nw_version%/node-webkit-v%nw_version%-win-ia32.zip
+7z e -onw node-webkit-v%nw_version%-win-ia32.zip
+dir nw
+set PATH=nw;%PATH%
+node-pre-gyp package testpackage --runtime=node-webkit --target=%nw_version% --target_arch=ia32
+if not "%CM%" == "%CM:[publish binary]=%" node-pre-gyp publish --msvs_version=2013 --runtime=node-webkit --target=%nw_version% --target_arch=ia32