WebSandboxMC

Update to NetCraft build 217:

• Add highly experimental VR support (satoshinm/NetCraft#63), only tested with Oculus Rift DK2
• Add build number, date, and commit hash to info text (satoshinm/NetCraft#61)
• Fix beeping when using movement keys while fullscreen (satoshinm/NetCraft#84)
• Fix preventing browser shortcut keys from firing (satoshinm/NetCraft#91)
• Fix typing two spaces unintentionally toggling fly mode (satoshinm/NetCraft#86)
• Fix gamepads showing as connected when they are actually disconnected in Chrome (satoshinm/NetCraft#94)
• Fix vertical joystick movement with standard gamepads in Chrome (satoshinm/NetCraft#92)
• Fix right joystick to look not working until triggering pointer lock (satoshinm/NetCraft#96)