It is possible to transfer files from the client to the guest
using File API [0] when a spice vd agent is connected.
Methods for the transfer are based on spice-gtk implementation.
[0] http://www.w3.org/TR/file-upload/
The first approach is to use a moving image to simulate the cursor.
This does not work well, so a second approach, involving static
cursors is provided. That requires a site administrator to precreate
all the cursors that can be used by a particular application set.
A warning message strongly suggests using a different browser as well.
This allows IE10 to function. Note that we would normally subclass
this type, but ArrayBuffer is implemented in native code, and so is
difficult to subclass.
