Fixed syntax error

added colon to constructor
Merger

Merge
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Item.py
	buyer.py
deleted buyer orig

deleted buyer orig
Merge remote-tracking branch 'upstream/master'
Added Class diagram and formatted readme.md

Added Class diagram and formatted readme.md
Updated Class Diagram

updated class diagram
Merge remote-tracking branch 'upstream/master'
Merge pull request #9 from mk319/master

Added ClassDiagram and Formatted Readme.md