project base
projects saving, opening and editing working;
added form for adding new work item;
added wpf gui;
refactored model
added view for project;
Project.cs inherits WorkItem.cs with factory method on GetCopy();
GUI set to wpf;
user control for item in project view;
added application settings;
added list of work items to WorkItem.cs;
code cleaning;
added view model for task;
added WorkItemUserControlFactory.cs;
included project view into main;
added label for ProjectTitle to ProjectView.xaml
view modifications
project container is using last opened project;
added status bar with command message;
changed NewWorkItemViewModel logic to support link;
updated views;
added close current project container feature;