Added magU

Added magU, reordered mag attributes
Merge pull request #323 from Sol-d/patch-10

Added magU
added planet/positionangle

added attribute positionangle to object planet
Merge pull request #327 from Sol-d/patch-12

added planet/positionangle
Changed Gliese 436 c/UCF-1.01 to controversial.
http://cdsads.u-strasbg.fr/abs/2012ApJ...755....9S
Alpha Centauri b considered controversial.
http://cdsads.u-strasbg.fr/abs/2013ApJ...770..133H
Merge remote-tracking branch 'oec/master'