Merge pull request #40 from mamartinod/master

Added magnitudes from simbad.
Changed Gamma Cephei to binary star system and added errordata
Endl et al. (2011) (http://dx.doi.org/10.1063/1.3556187),
Neuhäuser et. al. (2007) (http://dx.doi.org/10.1051/0004-6361:20066581)
Merge pull request #43 from twam/master

Changed Gamma Cephei to binary star system and added errordata
Merge branch 'master' of https://github.com/hannorein/open_exoplanet_catalogue