Make the xsens also return altitude.
Detect system libfreenect; removed CL NUI support; clean up.
Bugfix Xsens altitude and UTC.
Add sensor quaternions and use for xsens.
Fix xsens GPS observations.
Merge pull request #95 from jabjoe/xsens_alt

Xsens alt
Merge pull request #96 from jabjoe/xsens_quat

Xsens quat
XSens4: Fixed access to protected quaternion member (only fails in clang!?)

(cc @jabjoe)

Signed-off-by: Jose Luis Blanco <joseluisblancoc@gmail.com>
opencv: Fix #include dirs (changed in cv3.0 cmake?)
start solving compat with opencv 3.0
(Backup)
New CMake macro VERSION_TO_HEXADECIMAL()

Was needed after opencv 2.4.**10** !!
Fixed all opencv errors without old compat headers
Fix build against cv < 2.4.0
update Debian standards version
Many fixes for opencv 3.0
More fixes (for opencv <3.0)
fix bug in camera calib

Hopefuly -> Fixes #97
fix build against opencv<2.4
changelog formatting