Minor additions from my asana porting effort

One addition to make sure that project_name and project_id issues are caught right away, which makes broken CSV debugging easier.

The other change is to add an asana example csv and mapping file. The mapping file is better documented then the currently available one; I think the docs behind importing from CVS are pretty poor right now so this may help other users.

Not sure if you want them in the folders I chose, but you're free to move them around if you like.