[userspace] extending Asgaard and the WM protocol

[Meulengracht]

In order to support more advanced WM functionality required when we port the text editor and SDL, we need to implement and extend Asgaard with more functionality:

• Finish implementation of resizing
• Add posibility to swap between normal size/fullscreen
• Implement concept of 'on top'
• Implement missing destroy of pools
• Implement missing grab of mouse
• Icon: Click functionality
• Decoration bar: Move functionality
• Decoration bar: Maximize functionality
• Decoration bar: Close functionality
• Fix the crash that occurs when an asgaard-based application shutsdown
• Remember to register cleanup on atexit
• Cleanup clients that disconnect due to abrubt application exit

[Meulengracht]

It seems that it is a memory corruption that occurs in m_objects when ObjectManager::Destroy is invoked. The first thing that happens is we iterate through all objects and unsubscribe - but it seems that it crashes with invalid memory address when it tries to find the next link in the map after the first objec.t

[Meulengracht]

Fixed, we called destructors twice of ObjectManager and Application. Now we just need automated cleanup in vioarr