run npm install on scripts/code

#22

scripts/code.bat

@@ -1,12 +1,20 @@
 @echo off
 title VSCode Dev
 
+pushd %~dp0\..
+
+:: Node modules
+if not exist node_modules call .\scripts\npm.bat install
+
+:: Get electron
+node .\node_modules\gulp\bin\gulp.js electron
+
+:: Configuration
 set NODE_ENV=development
 set VSCODE_DEV=1
 set ELECTRON_ENABLE_LOGGING=1
 set ELECTRON_ENABLE_STACK_DUMPING=1
 
-pushd %~dp0\..
-node .\node_modules\gulp\bin\gulp.js electron
+:: Launch Code
 .\.build\electron\CodeOSS.exe . %*
 popd