Planet c added, c renamed to d, values updated

Typo in Rowe et al., the planets were first mentioned there: http://arxiv.org/pdf/1208.0942v1.pdf. NASA Exoplanet Archive have all three planets and informated about this typo.
Values updated from Kepler table of Confirmed planets
Merge pull request #126 from jaroslavmerc/patch-3

Planet added, values updated