Bugfix in the example and added attitude correction (roll and pitch for now).

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Updated doc and copyright
Fix attitude
Try fixing nadir.
Computations for true nadir.
Cosmetics.
Merge branch 'release-0.2.3'
Merge branch 'pre-master' into geoloc
Merge branch 'master' into geoloc
vectorize the days function.
Merge branch 'feature-vectorize' into geoloc
Add geoloc example.

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Merge branch 'geoloc' of github.com:mraspaud/pyorbital into geoloc
Add instrument examples for geoloc.

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Add Mikhail's definition of AMSU-A
Factorize avhrr code (geoloc definition)

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Make the scan angle of avhrr an argument.
Fix syntax error in doc/conf.py
Add some logging in tle file fetching.

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Numpyze the orbital computation.

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>