Disable catalog communication when I not use it

[sarkiroka]

I use poco with catalog, and it is a great feature. But when I use poco with a project which is not in a catalog, then it shoudn't use catalog.
For example when I use with catalog poco up project/plan syntax, it is okay to pull from catalog
But when in a project, I use poco up myplan then it should not pull anything from catalog. Please fix this issue