Updated values for several low density exoplanets

Dear Hanno / Others,

I hope that I'm doing the right thing now.. 

I have updated the following exoplanets;
HATP-40; Hartman et al (2012)
http://adsabs.harvard.edu/abs/2012AJ....144..139H
Wasp-17 b; Southworth et al. (2012)
http://adsabs.harvard.edu/abs/2012MNRAS.426.1338S
Wasp-31 b; Anderson et al. (2011)
http://adsabs.harvard.edu/abs/2011MNRAS.416.2108A
Wasp-63 b; Hellier et al. (2012) [added errbars]
http://adsabs.harvard.edu/abs/2012MNRAS.426..739H


It should be noted that OGLE-TR-10 needs further spectra, since its values have been determined on a wide spread; Southworth2012.