Merge pull request #13 from twam/master

Errorbars/Upper limits for Kepler-47. Source: http://dx.doi.org/10.1126%2Fscience.1228380
Added illustration to Gliese 876 e. Source: Jonah Gallagher.
removed empty tag.
KOI-423b. Added transit time. Need confirmation because the value seems very lower than I used to see. http://arxiv.org/abs/1106.3225
KOI-428b. Added transit time. http://arxiv.org/abs/1101.0196
Kepler-10b. Added transit time. http://dx.doi.org/10.1088/0004-637X/729/1/27
Kepler-10c. Added transit time. http://arxiv.org/abs/1105.4647
Merge commit '408aaedba117d586b507c352ce676c426fc9bd24'
KOI-423 : update transit time.
Kepler 12b. Added transit time. http://arxiv.org/abs/1109.1611
Kepler 14b: added transit time. http://arxiv.org/abs/1106.5510
Kepler 15: added transit time. http://arxiv.org/abs/1107.2596
Added errorbars for Gliese 876. Error do not include errors in stellar
parameters. Source: http://adsabs.harvard.edu/abs/2010ApJ...719..890R
Added Gliese 221. Source: http://arxiv.org/abs/1305.2203
Merge branch 'master' of https://github.com/hannorein/open_exoplanet_catalogue
Updated Fomalhaut. Source: http://arxiv.org/abs/1305.2222
Merge branch 'master' of https://github.com/hannorein/open_exoplanet_catalogue
Renamded KIC 4570949 to Kepler-76
Added tag list to readme.
Added nickname "Einstein's Planet".