This removes the earlier work done in libx52 to support USB hotplug.
This wasn't adequately tested, and the reason to have hotplug support
was to address perceived deficiencies in the standard API.
However, on recent reflection and experimentation, it seems to be easier
to support adding methods to connect to an X52/X52Pro joystick
dynamically after initializing the library. This approach also lends
itself to adding checks when sending control packets to close the device
handle when it detects device disconnection. Also, one could add a
disconnect method to disconnect from any connected joysticks.
Finally, this commit reverts a series of commits that chronicled my
journey into implementing hotplug support and simulating it in
libusbx52. By coalescing the revert into a single commit, it makes it
easier to revert the revert in the future, if necessary.
Prior to this change, libx52 would require that the X52/Pro be plugged
in before initialization. This change allows the application to
initialize libx52 even before the device is plugged in.
This commit adds the implementation of the stub libusb library in order
to use it in an LD_PRELOAD environment. This also adds the utility
programs to create a device list and sample output to compare against.
nirenjan