What's New:
v1.7.1
* Reduce memory use when reading gamepad mappings file
* Include missing files in tarball distribution [Rui Chen]
v1.7
* Avoid calling xroar_screenshot() when not supported [with Paul Ripke]
* Avoid X11 keyboard init when SDL not build with X11 support [Paul Ripke]
* SDL joystick module supports hotplug where possible
* SDL joystick module creates Left & Right stick profiles if found
* Support reading a SDL gamepad DB file for non-SDL joystick modules
* New -joy-db-file option specifies SDL-compatible gamepad DB file
* New Linux evdev joystick module (hotplug, internal SDL DB, L/R profiles)
* Large changes to underlying UI mechanisms
* New features backported to GTK+ 2 UI