PLEASE TEST

the program should be done. Please test it out and let me know what
should be fixed.
Merge branch 'mitchell' of https://github.com/mitchmox/Library-Catalog into mitchell

Conflicts:
	Library Catalog.userprefs
	library/Patron.cs
	library/bin/Debug/library.exe
	library/obj/x86/Debug/library.exe
	library/users-patrons.txt
	library/users-staff.txt