remotebox: 1.9 -> 2.0

Changes:
- RemoteBox now requires VirtualBox 5.0.x
- Added guest support for USB 3.0
- Added OS icons for Windows 10, OS/2 1.x, Yosemite, El Capitan
- Added command line options for automatic login. See manual
- Added option to set the virtual VGA card of a guest to either
  VirtualBox VGA or VMware SVGA-II
- Allow snapshots to be taken while the guest is paused
- Added support for adding USB storage controller to a guest
- Added support for adding transient shared folders
- Added support for setting IPv6 Port Forwarding rules on NAT networks
- Added option to convert disk images to VDI when importing an
  appliance
- Changed the way guest details are displayed and added an option
  to show extended (slower) or reduced (faster) guest details
- Added support for selecting built-in presets for the RDP clients.
  These are currently FreeRDP (New Syntax), FreeRDP (Old Syntax),
  Rdesktop, Windows Remote Desktop Client
- Added support for selecting the paravirtualization interface for
  a guest
- Added keyboard toolbutton for quick access to common keyboard
  sequences. The full keyboard menu is still available
- Fixed a problem with trailing slashes in a URL preventing the
  remote display to a guest from opening.
- Fixed a problem with UTF8 strings affecting the listing of storage
  attached to controllers
- Fixed an issue where stuck guests couldn't be stopped from the GUI
- Various GUI tweaks