Use up-to-date version from git. While currently there aren't official releases
newer than 0.7.5, quite some new features have been added in git, for example
the ability to disable the calibration screen timeout.
Additionally depend on libxrandr, so that xinput_calibrator can use the library
directly to obtain the geometry, instead of parsing the output of the xrandr
binary (parsing of the output can easily break, for example when the output
name is made up of two words instead of one).
Signed-off-by: Diego Rondini <diego.ml@zoho.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
