made changes to current working core object model
added entity
Merge branch 'nick' of https://github.com/jacoblwright/hit into evan
Finalish Javadocs for Evan
Merge branch 'nick' of https://github.com/jacoblwright/hit into evan
Merge branch 'andy' of https://github.com/jacoblwright/hit into evan

Conflicts:
	src/model/Product.java
	src/model/ProductManager.java
Added Exceptions
Added part of ProductAndItemEditor
Merge branch 'nick' of https://github.com/jacoblwright/hit into evan
Merge branch 'andy' of https://github.com/jacoblwright/hit into evan
Finished stubs of ProductAndItemEditor
Cleaned up some files
Cleaned up some files
Merge branch 'jake' of https://github.com/jacoblwright/hit into nick
Merge branch 'jake' of https://github.com/jacoblwright/hit into evan
Added JUnit library
Worked on impl of editors, Serializer, Controller; also added Apache commons IO library.
updating files before pulling everyones stuff.
fixed merge conflict
Changed name of Controller class to Model