Added Kepler-71

Created from file of KOI 217.01, values updated from http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=K00217.01&type=KEPLER_CANDIDATE.

#144
Rename Kepler-71 to Kepler-71.xml
Update Kepler-71.xml
Merge pull request #151 from jaroslavmerc/patch-13

Added Kepler-71. Talk abstract: http://adsabs.harvard.edu/abs/2012AAS...22031804Q