Also define properties for regular info attributes.
Also define properties for regular info attributes.

Gets rid of __getattr__ and __setattr__, but now bad names
can be stored.

larrybradley/astropy,mhvk/astropy,MSeifert04/astropy,lpsinger/astropy,saimn/astropy,stargaser/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,MSeifert04/astropy,StuartLittlefair/astropy,pllim/astropy,StuartLittlefair/astropy,mhvk/astropy,pllim/astropy,larrybradley/astropy,aleksandr-bakanov/astropy,dhomeier/astropy,lpsinger/astropy,stargaser/astropy,lpsinger/astropy,astropy/astropy,saimn/astropy,stargaser/astropy,aleksandr-bakanov/astropy,mhvk/astropy,astropy/astropy,pllim/astropy,stargaser/astropy,saimn/astropy,pllim/astropy,astropy/astropy,MSeifert04/astropy,mhvk/astropy,saimn/astropy,larrybradley/astropy,dhomeier/astropy,larrybradley/astropy,lpsinger/astropy,dhomeier/astropy,astropy/astropy,larrybradley/astropy,MSeifert04/astropy,dhomeier/astropy,dhomeier/astropy,StuartLittlefair/astropy,pllim/astropy,mhvk/astropy,astropy/astropy,saimn/astropy,aleksandr-bakanov/astropy,aleksandr-bakanov/astropy,lpsinger/astropy