Adapted to Qt5
Add new categories
Vertical & Horizontal layouts replaced by GridLayout
Fix layouts
Remove Energy binary file
Add history on widget
Fix bug in calculations
Add update current time
Add icons on the date time buttons
Add new classes
Add FileOpenException
Rename IHistoryCreator & IHistoryGetter to IHistoryWriter & IHistoryReader
Fill new Classes (except readHistory() )
Fix bug in calculation (over 800)
Partially embedded XmlHistoryManager in MainWindow
Add read-functionality in XmlHistoryManager
Add backward-forward buttons actions
TODO: fix read-functionality
Fixed read-functionality
Fix enables of buttons
Add tray info & message box error
New format date-time
Replaced QList by QQueue
Fix bug in XmlHistoryManager
Replaced QQueue by QList back again
Fixed bug crashing program then history-file was empty
Fixed bug resize window after start program
Fix read-write response program
Add trUtf8() for translate application