Simple Invoicer 1.0b2

Simple Invoicer is a small application that allows you to keep track of hours worked, create and send invoices, and track payments received on a specific project. I created it for my own needs.
I typically work on multiple projects at a time for a small number of clients and wanted a program to track my time on a project basis, rather than on a client basis.
At some point, I may re-write this using Core Data and Cocoa Bindings to make a more robust and user-friendly application, but for now caveat emptor.
Enhancements:
- Corrected a problem with the "review unsaved documents" functionality where the application would terminate before the user could review their documents.