-Add convertor function (Temperature, length, Weight)
-add new functional to 3 windows (Temperature, Distance, Weight)
-fix (warning), Add Qlable to Conversion windows
-deleted third lineEdit, fix covert bug in Temperature
-deleted 3 lineEdit in mainWindow
-Fix bug in mainwindow temperature coverter
-fix bug in mainWindow (temperature)
Merge branch 'AndrewS/NewFunctionCovertorAll' into FixForMErge