add base class.
refactoring HorizontalLineGauge.
refactoring CPUHorizontalLineGauge.
refactoring MemoryHorizontalLineGauge.
refactoring VerticalLineGauge.
refactoring CPUVerticalLineGauge.
refactoring MemoryVerticalLineGauge.
refactoring Horizontalstackview.
refactoring CPUHorizontalStackView.
refactoring MemoryHorizontalStackView.
refactoring InfoTextLine.
refactoring Layout.
fixed height in VerticalStackLayout.
change to absolute_import.
memory display as int.
replace addstr.
add addstr_with_existing_attr()
display percent info with existing attr.
version up psutil.
don't show each cpu if cpu is only one.