Fix a problem with the Windows jscript runtime

The problem is with this line in "create.js":

var ACTIVITY_PATH=PROJECT_PATH+'\\src\\'+PACKAGE_AS_PATH+'\\'+ACTIVITY+'.java';
[...]
exec('%comspec% /c copy "'+ROOT+'"\\bin\\templates\\project\\Activity.java '+ ACTIVITY_PATH +' /Y');

The Windows "copy" command will not create directories that don't exist, so the command above fails because "src\PACKAGE_AS_PATH" doesn't exist.  This can be fixed with: