Extraterm v0.11.0

• Keyboard handling is fixed and works for non-US keyboards.
• Alt/meta key now works as expected. (Emacs should work fine now). Also other modifiers are sent when keys are pressed.
• Changed some keyboard shortcuts to not conflict with console apps.
• Added a bunch of terminal color themes.
• Useful tips are displayed when opening a new tab (configurable).
• Some other fixes related to flicking and extra blank space appearing.