calculate project and pos hitlist async
thread safe QuickFillObservableCollection
fix #45 and change days of month ItemsControl to ListBox
create DayOfMonthDataTemplate
ListBox instead ItemsControl for week days
ListBox instead ItemsControl for short cuts
ListBox instead ItemsControl for project hitlist
ListBox instead ItemsControl for pos hitlist
fix res key warning
create UsageHistoryDayDataTemplate
Merge pull request #47 from dotob/some-async-tests

some async/await tests and fixes