Change FITS_rec.names to use names from recarray by default
Change FITS_rec.names to use names from recarray by default

Getting names from dtype.names should be safe and avoids accessing _coldefs.

Also use directly self.names, and change several _coldefs indexing to get the
column before accessing an attribute.

funbaker/astropy,joergdietrich/astropy,tbabej/astropy,kelle/astropy,bsipocz/astropy,AustereCuriosity/astropy,astropy/astropy,astropy/astropy,pllim/astropy,AustereCuriosity/astropy,lpsinger/astropy,AustereCuriosity/astropy,AustereCuriosity/astropy,mhvk/astropy,funbaker/astropy,funbaker/astropy,pllim/astropy,funbaker/astropy,MSeifert04/astropy,larrybradley/astropy,StuartLittlefair/astropy,joergdietrich/astropy,lpsinger/astropy,pllim/astropy,stargaser/astropy,larrybradley/astropy,dhomeier/astropy,StuartLittlefair/astropy,DougBurke/astropy,tbabej/astropy,pllim/astropy,StuartLittlefair/astropy,mhvk/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,dhomeier/astropy,pllim/astropy,kelle/astropy,joergdietrich/astropy,joergdietrich/astropy,aleksandr-bakanov/astropy,tbabej/astropy,astropy/astropy,astropy/astropy,mhvk/astropy,DougBurke/astropy,AustereCuriosity/astropy,mhvk/astropy,stargaser/astropy,MSeifert04/astropy,DougBurke/astropy,aleksandr-bakanov/astropy,stargaser/astropy,joergdietrich/astropy,saimn/astropy,larrybradley/astropy,tbabej/astropy,saimn/astropy,saimn/astropy,bsipocz/astropy,mhvk/astropy,dhomeier/astropy,kelle/astropy,MSeifert04/astropy,stargaser/astropy,aleksandr-bakanov/astropy,lpsinger/astropy,astropy/astropy,saimn/astropy,bsipocz/astropy,MSeifert04/astropy,saimn/astropy,StuartLittlefair/astropy,lpsinger/astropy,DougBurke/astropy,lpsinger/astropy,kelle/astropy,bsipocz/astropy,StuartLittlefair/astropy,dhomeier/astropy,kelle/astropy,larrybradley/astropy,dhomeier/astropy,tbabej/astropy