set alpha channel to the same type as the other channels.

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Use cartesian coordinates for lon/lat computation if near-pole situations.

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

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Use "imp" to find input plugins.

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Merge branch 'pre-master' of github.com:mraspaud/mpop into pre-master
Fix the parallax file sorting problem, again.

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