Relationships

Finalized relationships for one-to-one and one-to-many with support for
inverse relationships of varying types.
Relationship Bug Fixes and Class Removal

refer to title
Able to remove classes.

Contains code for removing classes. Property removal code is
implemented but has not been tested and is therefore inaccessible.
PFObject removal is inaccessible and unimplemented despite the button
which hides itself.