Created updater class to enable unit testing
First real unit test
Added item creator and new test
Finished tests for generic items
Added Brie tests
Added sulfuras tests
Added backstage pass tests and brie updater
Added pass updater
Added no op updater
Used Generic updater and removed old update code
Added updater factory
Code cleanup
Made pass tests use more generic name
Added test stubs for conjured items
Implemented conjurer support
Final code cleanup