Modified before hook in Post Model tests to register 5 users and set the
first one as owner. Also modified UserModel to always cast _id into an
int. (86/86 with Post at 13/13)
Added failing test for Post.create() to return an array. Also added
samplePost to test/helper.models
Added utility createPublic node and added to before hook for Post Model
tests. Might want to eventually create a db.prep() function to handle all
required db setup for the application to run
Successfully adds a Post to db and creates proper relationships (less
tags). Still failing test since results have not yet been parsed.