Deleted error bars with zero value

i think, that error bars with value Zero are not senseful. i found no other information in literature
Merge pull request #263 from Sol-d/patch-22

Deleted error bars with zero value
Deleted error bars with zero value
Deleted error bars with zero value
Deleted error bars with zero value
Merge pull request #266 from Sol-d/patch-25

Deleted error bars with zero value
Merge pull request #264 from Sol-d/patch-23

Deleted error bars with zero value
Merge pull request #265 from Sol-d/patch-24

Deleted error bars with zero value
Minor changes
Merge branch 'master' of github.com:OpenExoplanetCatalogue/open_exoplanet_catalogue
Removed error bars with value 0
Merge pull request #269 from Sol-d/patch-27

Removed error bars with value 0
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of github.com:Rajeev-Jeyaraj/open_exoplanet_catalogue into Rajeev-Jeyaraj-master
Minor changes to Kepler 418
Merge branch 'master' of github.com:OpenExoplanetCatalogue/open_exoplanet_catalogue
Deleted BD-061339. Is duplicate of Gliese 221.
Added e="" tag to cleanup script for easy data entry.
Updated Kepler-10. Source: http://arxiv.org/abs/1405.7881
Combined ksi Aql and xi Aql. Closes #272.